Peterborough and Leyton Orient will go into the second leg of their League One play-off semi-final all square after a scrappy draw at London Road.

Britt Assombalonga headed in Mark Little's cross-cum-shot to put Posh ahead on 16 minutes.

Dean Cox had three chances to level before half-time, including a one-on-one saved by Bobby Olejnik.

The equaliser came when Moses Odubajo rolled in the loose ball after David Mooney's effort was saved.

Posh's play-off perfection

Peterborough United have succeeded in all three of their previous play-off campaigns, winning promotion from the third tier in 1992, the fourth tier in 2000 and the third tier in 2011.

Leyton Orient won their maiden play-off campaign in 1989, winning promotion from the fourth tier. The O's were beaten finalists in the third-tier play-off final in 1999 and 2001.

Cox could have won it, but Olejnik kept out his near-post shot.

Russell Slade's Orient spent a large part of the season in the automatic promotion spots but, with just three wins in their last 10 games, had to settle for third place and a two-legged tie against Peterborough.

Posh have never failed in three previous play-off campaigns and are looking for an immediate return to the Championship.

The O's, who are now in their eighth consecutive season in League One, were inches away from an early lead when Kevin Lisbie's shot across goal eluded the toe of Mooney.

But Posh led, perhaps fortunately, when Jamie Jones parried Danny Swanson's shot out to Little, whose effort across goal was nodded in by Assombalonga, seemingly from an offside position, for his 33rd goal of the campaign.

Britt Assombalonga gives Peterborough a 1-0 lead against Leyton Orient

Britt Assombalonga scored his 33rd goal of the season to give Peterborough a first-half lead

Orient should have hit back, but Lisbie lost the ball under his feet during a goalmouth scramble and Cox missed a trio of chances; seeing his goalbound header blocked by Michael Bostwick after Olejnik had flapped at a long throw, failing to connect with a loose ball 10 yards out and then pulling a save from Olejnik from a tight angle.

Posh saw little of the ball in a second half low on quality but, despite Orient's possession, Assombalonga squandered a good chance on the break, firing straight at Jones, while Tommy Rowe dragged an effort wide.

The O's had been struggling to create openings but finally levelled with 18 minutes remaining when former Posh striker Shaun Batt headed down to Mooney, whose shot was parried by Olejnik into the path of Odubajo for a simple finish.

Cox pulled a superb save from Olejnik before Odubajo flashed wide, as Slade's side failed to grasp an advantage to take back to Brisbane Road for Tuesday's second leg.

Peterborough United boss Darren Ferguson told BBC Radio Cambridgeshire:

"We started off really well to get into the lead. When we were composed on the ball we caused them problems but on the day they were better than us.

"In the second half I thought we didn't keep the ball enough.

"If I was in their camp I would be thinking it was a missed opportunity. We've got a great chance now.

"Coming into this game, it was the one that slightly concerned me. I think the second leg will be far better suited for us away from home."

Leyton Orient boss Russell Slade told BBC London 94.9:

"I wasn't happy with their goal. Clearly Assombalonga has got the last touch in an offside position. For that not to be seen is very disappointing.

"Full credit to my team. We kept grinding away in the second half, we were dominate in patches and created chances all afternoon. Thankfully we got one in the end.

"I don't think being at home in the second leg has any advantage. There's no written script in the play-offs.

"It's no good wishing we're going to get to Wembley. Wishing never won anything. It's about that work ethic."

Lineup, Bookings (2) & Substitutions (5)

Peterborough United

  • 01 Olejnik
  • 31 Little
  • 03 Ntlhe Booked
  • 06 Bostwick
  • 02 Alcock Booked
  • 05 Baldwin
  • 07 Swanson (Isgrove - 71' )
  • 08 Payne (McCann - 82' )
  • 09 Assombalonga
  • 21 Ajose (Washington - 52' )
  • 14 Rowe

Substitutes

  • 11 McCann
  • 13 Day
  • 17 Newell
  • 20 Knight-Percival
  • 24 Washington
  • 36 McQuoid
  • 37 Isgrove

Leyton Orient

  • 01 Jones
  • 05 Cuthbert
  • 02 Omozusi
  • 04 Vincelot
  • 06 Baudry
  • 15 Clarke
  • 11 Odubajo
  • 24 Lundstram (James - 70' )
  • 10 Mooney
  • 09 Lisbie (Batt - 70' )
  • 07 Cox

Substitutes

  • 03 Sawyer
  • 08 James
  • 12 Larkins
  • 14 Batt
  • 21 Bartley
  • 23 Dagnall
  • 29 Ness
Ref: Graham Salisbury
Att: 9,519

Match Stats

Shots

9 16

On target

3 6

Corners

3 6

Fouls

11 9

Live Text Commentary

Full time

Full Time Match ends, Peterborough United 1, Leyton Orient 1.

90:00 +5:27 Full time

Full Time Second Half ends, Peterborough United 1, Leyton Orient 1.

90:00 +4:50

Attempt missed. Michael Bostwick (Peterborough United) right footed shot from the left side of the six yard box is close, but misses to the left. Assisted by Grant McCann with a cross following a corner.

90:00 +4:37 Booking

Booking Kgosi Ntlhe (Peterborough United) is shown the yellow card.

90:00 +4:18

Corner, Peterborough United. Conceded by David Mooney.

90:00 +3:36

Foul by Moses Odubajo (Leyton Orient).

90:00 +3:36

Kgosi Ntlhe (Peterborough United) wins a free kick on the left wing.

90:00 +1:51

Moses Odubajo (Leyton Orient) wins a free kick in the defensive half.

90:00 +1:51

Foul by Kgosi Ntlhe (Peterborough United).

89:32

Attempt saved. Shaun Batt (Leyton Orient) left footed shot from a difficult angle on the right is saved in the centre of the goal. Assisted by Scott Cuthbert.

88:25

Offside, Leyton Orient. Elliot Omozusi tries a through ball, but David Mooney is caught offside.

85:14

Foul by Moses Odubajo (Leyton Orient).

85:14

Kgosi Ntlhe (Peterborough United) wins a free kick on the left wing.

84:28

Attempt missed. Moses Odubajo (Leyton Orient) left footed shot from the right side of the box is close, but misses to the left.

81:31

Offside, Leyton Orient. Dean Cox tries a through ball, but David Mooney is caught offside.

81:30

Attempt saved. Dean Cox (Leyton Orient) right footed shot from outside the box is saved in the centre of the goal. Assisted by Shaun Batt.

81:02 Substitution

Substitution Substitution, Peterborough United. Grant McCann replaces Jack Payne.

79:47

Delay over. They are ready to continue.

79:05

Delay in match Jack Payne (Peterborough United) because of an injury.

76:02

Attempt missed. Mathieu Baudry (Leyton Orient) header from the right side of the six yard box misses to the left. Assisted by Dean Cox with a cross following a corner.

75:40

Corner, Leyton Orient. Conceded by Robert Olejnik.

75:35

Attempt saved. Dean Cox (Leyton Orient) right footed shot from the left side of the box is saved in the bottom left corner. Assisted by Lloyd James with a cross.

74:28

David Mooney (Leyton Orient) wins a free kick in the defensive half.

74:28

Foul by Kgosi Ntlhe (Peterborough United).

71:56 Goal scored

Goal! Goal! Peterborough United 1, Leyton Orient 1. Moses Odubajo (Leyton Orient) right footed shot from the right side of the six yard box to the bottom right corner.

71:54

Attempt saved. David Mooney (Leyton Orient) right footed shot from the centre of the box is saved in the bottom right corner. Assisted by Shaun Batt with a headed pass.

70:37 Substitution

Substitution Substitution, Peterborough United. Lloyd Isgrove replaces Danny Swanson.

69:47 Substitution

Substitution Substitution, Leyton Orient. Lloyd James replaces John Lundstram.

69:34 Substitution

Substitution Substitution, Leyton Orient. Shaun Batt replaces Kevin Lisbie.

69:10

Offside, Leyton Orient. Nathan Clarke tries a through ball, but Kevin Lisbie is caught offside.

68:22

Romain Vincelot (Leyton Orient) wins a free kick in the defensive half.

68:22

Foul by Michael Bostwick (Peterborough United).

67:45

Attempt missed. Kevin Lisbie (Leyton Orient) right footed shot from the centre of the box misses to the right. Assisted by Mathieu Baudry following a fast break.

67:35

Attempt blocked. Jack Payne (Peterborough United) right footed shot from outside the box is blocked. Assisted by Michael Bostwick.

66:07

Dean Cox (Leyton Orient) wins a free kick in the defensive half.

66:07

Foul by Danny Swanson (Peterborough United).

65:42

Foul by Moses Odubajo (Leyton Orient).

65:42

Conor Washington (Peterborough United) wins a free kick on the left wing.

63:56

Moses Odubajo (Leyton Orient) wins a free kick on the right wing.

63:56

Foul by Jack Payne (Peterborough United).

63:40

Kevin Lisbie (Leyton Orient) wins a free kick in the defensive half.

63:40

Foul by Michael Bostwick (Peterborough United).

62:09

Attempt missed. Kgosi Ntlhe (Peterborough United) left footed shot from outside the box is high and wide to the left. Assisted by Jack Payne.

58:34

Elliot Omozusi (Leyton Orient) wins a free kick in the defensive half.

58:34

Foul by Britt Assombalonga (Peterborough United).

56:38

Delay over. They are ready to continue.

55:56

Delay in match Mark Little (Peterborough United) because of an injury.

54:46

Attempt missed. Tommy Rowe (Peterborough United) left footed shot from outside the box is close, but misses to the right. Assisted by Danny Swanson.

54:10

Offside, Peterborough United. Jack Baldwin tries a through ball, but Britt Assombalonga is caught offside.

52:14

Offside, Leyton Orient. Mathieu Baudry tries a through ball, but Kevin Lisbie is caught offside.

51:41 Substitution

Substitution Substitution, Peterborough United. Conor Washington replaces Nicky Ajose.

49:19

Attempt saved. Britt Assombalonga (Peterborough United) right footed shot from the centre of the box is saved in the centre of the goal. Assisted by Michael Bostwick with a through ball.

48:16

Corner, Leyton Orient. Conceded by Kgosi Ntlhe.

46:19

David Mooney (Leyton Orient) wins a free kick in the defensive half.

46:19

Foul by Michael Bostwick (Peterborough United).

45:00

Second Half begins Peterborough United 1, Leyton Orient 0.

45:00 +1:15 Half time

Half Time First Half ends, Peterborough United 1, Leyton Orient 0.

45:00 +0:32

Attempt saved. Dean Cox (Leyton Orient) right footed shot from the left side of the box is saved in the centre of the goal. Assisted by Kevin Lisbie.

44:00

Attempt blocked. David Mooney (Leyton Orient) right footed shot from the centre of the box is blocked. Assisted by Scott Cuthbert with a cross.

43:52

Attempt blocked. Dean Cox (Leyton Orient) header from the centre of the box is blocked.

42:10

Attempt missed. Romain Vincelot (Leyton Orient) right footed shot from outside the box is close, but misses to the left following a corner.

41:23

Corner, Leyton Orient. Conceded by Mark Little.

39:23

Elliot Omozusi (Leyton Orient) wins a free kick in the defensive half.

39:23

Foul by Danny Swanson (Peterborough United).

37:45

Foul by John Lundstram (Leyton Orient).

37:45

Tommy Rowe (Peterborough United) wins a free kick in the attacking half.

36:19

Corner, Leyton Orient. Conceded by Craig Alcock.

32:43

Mark Little (Peterborough United) wins a free kick in the defensive half.

32:43

Foul by David Mooney (Leyton Orient).

30:54

Attempt missed. David Mooney (Leyton Orient) right footed shot from the left side of the six yard box is close, but misses to the left following a corner.

30:27

Corner, Leyton Orient. Conceded by Kgosi Ntlhe.

29:48

Attempt missed. Nicky Ajose (Peterborough United) right footed shot from outside the box is close, but misses to the right. Assisted by Tommy Rowe following a set piece situation.

28:44

Kgosi Ntlhe (Peterborough United) wins a free kick in the attacking half.

28:44

Foul by Mathieu Baudry (Leyton Orient).

27:28

Britt Assombalonga (Peterborough United) wins a free kick on the right wing.

27:28

Foul by Nathan Clarke (Leyton Orient).

20:29

Offside, Peterborough United. Jack Payne tries a through ball, but Britt Assombalonga is caught offside.

18:49 Booking

Booking Craig Alcock (Peterborough United) is shown the yellow card for a bad foul.

18:18

Foul by Craig Alcock (Peterborough United).

18:18

Moses Odubajo (Leyton Orient) wins a free kick in the attacking half.

16:43

Foul by Kgosi Ntlhe (Peterborough United).

16:43

Moses Odubajo (Leyton Orient) wins a free kick on the right wing.

15:34 Goal scored

Goal! Goal! Peterborough United 1, Leyton Orient 0. Britt Assombalonga (Peterborough United) header from very close range to the centre of the goal. Assisted by Mark Little with a cross.

15:28

Attempt saved. Danny Swanson (Peterborough United) right footed shot from outside the box is saved in the bottom right corner. Assisted by Nicky Ajose.

13:27

Offside, Leyton Orient. Dean Cox tries a through ball, but David Mooney is caught offside.

13:00

Attempt missed. Mark Little (Peterborough United) right footed shot from the centre of the box misses to the left. Assisted by Danny Swanson following a corner.

12:27

Corner, Peterborough United. Conceded by Elliot Omozusi.

11:39

Tommy Rowe (Peterborough United) wins a free kick in the defensive half.

11:39

Foul by David Mooney (Leyton Orient).

10:51

Offside, Peterborough United. Danny Swanson tries a through ball, but Britt Assombalonga is caught offside.

10:10

Hand ball by David Mooney (Leyton Orient).

6:40

Attempt blocked. David Mooney (Leyton Orient) left footed shot from outside the box is blocked.

3:47

Corner, Peterborough United. Conceded by Elliot Omozusi.

1:47

Attempt missed. David Mooney (Leyton Orient) right footed shot from very close range misses to the left. Assisted by Kevin Lisbie following a corner.

1:46

Attempt missed. Kevin Lisbie (Leyton Orient) right footed shot from a difficult angle on the right misses to the left. Assisted by Scott Cuthbert with a headed pass following a corner.

1:00

Corner, Leyton Orient. Conceded by Craig Alcock.

0:00

First Half begins.

0:00

Lineups are announced and players are warming up.

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