Brighton 2 - 0 Peterborough
Craig Noone and Ryan Harley scored stunning goals either side of half-time as unbeaten Brighton moved top of the Championship.
Noone cashed in on poor defending to fire in the opener from 20 yards.
Posh almost drew level seconds after the restart when Lee Frecklington rounded keeper Casper Ankergren but Inigo Calderon cleared off the line.
Harley wrapped up the points when he curled home a stunning 30-yard free-kick in the 65th minute.
Gus Poyet's side remain unbeaten at their new Amex Stadium following their promotion season from League One.
They should have taken the lead in the seventh minute when Noone escaped down the left and pulled the ball back for Ashley Barnes on the penalty spot but the striker missed the target.
Three minutes later, Brighton got the breakthrough they had been threatening when Noone collected a miskick from Peterborough goalkeeper Paul Jones before cutting inside and crashing home a low drive from 20 yards.
Peterborough almost hit straight back but Ankergren pulled off a fine saves to deny Grant McCann and Paul Taylor.
And they suffered a further blow when playmaker George Boyd was forced off through injury 10 minutes before the break.
Brighton almost doubled their lead just before half-time but Lewis Dunk's close-range effort was blocked and Harley put the rebound wide.
Noone then went close to a second with a header before Harley finally struck.
Peterborough's Tommy Rowe fouled Barnes 30 yards out and Harley stepped up to curl a brilliant free-kick past Jones and into the top corner.
Late on, Seagulls' record signing Craig Mackail-Smith had a chance to score against his former club late but the £2.5m striker headed wide.
Brighton manager Gus Poyet:
"We are top of the table and deserve to be, although it's very, very early.
"We were professional today and knew we had to be organised at the back.
"As soon as we scored, the game opened up a little bit, and although Peterborough tried their best to come back at us they had mainly to rely on shots from long distance."
Peterborough assistant manager Kevin Russell:
"For long periods there wasn't much between the teams, but we only created two chances. Our final ball was very disappointing.
"We are extremely disappointed with the first goal, in particular, as it was a poor goal all round.
"If goalkeepers make mistakes at this level, they are punished. That is football.
"Our two centre-halves, Gabriel Zakuani and Ryan Bennett, were outstanding. But we desperately lacked a cutting edge, and we never looked like getting past the Brighton defence."
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Live Text Commentary
Full Time The game is over, as the referee blows his whistle.90:00 +4:10
Lee Tomlin takes a shot. Save made by Casper Ankergren.90:00 +2:29
Ryan Bennett restarts play with the free kick.90:00 +2:29 Booking
Booking Inigo Calderon receives a yellow card for unsporting behaviour.89:39 Substitution
Substitution Craig Mackail-Smith leaves the field to be replaced by Kazenga LuaLua.89:39
Free kick awarded for an unfair challenge on Craig Alcock by Inigo Calderon.89:23
Lee Frecklington gives away a free kick for an unfair challenge on Alan Navarro. Marcos Painter restarts play with the free kick.88:56
Unfair challenge on Marcos Painter by Lee Tomlin results in a free kick. Marcos Painter takes the free kick.86:56
Direct free kick taken by Casper Ankergren.86:56 Booking
Booking Booking for Lee Frecklington for unsporting behaviour.86:36
Unfair challenge on Liam Bridcutt by Lee Frecklington results in a free kick.85:02
Effort from inside the area by David Ball misses to the right of the goal.84:08
Corner taken by Grant McCann, Marcos Painter manages to make a clearance.83:29
Inswinging corner taken right-footed by Lee Frecklington from the left by-line, Ashley Barnes manages to make a clearance.82:41
Free kick awarded for a foul by Ashley Barnes on Grant McCann. Paul Jones takes the direct free kick.79:06
The referee blows for offside against Lee Frecklington. Indirect free kick taken by Casper Ankergren.77:49
Grant McCann fouled by Matthew Sparrow, the ref awards a free kick. Grant McCann shoots direct from the free kick, save by Casper Ankergren.75:51
Grant McCann produces a left-footed shot from just outside the penalty box that misses to the left of the goal.75:18
Grant McCann takes the inswinging corner, clearance made by Craig Mackail-Smith.73:11
Effort from the edge of the area by Lee Frecklington goes wide of the right-hand upright.
Substitution Ryan Harley leaves the field to be replaced by Matthew Sparrow.71:17 Substitution
Substitution Craig Noone goes off and Alan Navarro comes on.71:03
Close range header by Craig Mackail-Smith misses to the right of the goal.67:44
Inswinging corner taken by Ryan Harley from the left by-line, Lee Frecklington manages to make a clearance.67:11
Lee Tomlin takes a shot. Save by Casper Ankergren.66:44
Craig Mackail-Smith concedes a free kick for a foul on Grant McCann. Free kick taken by Grant McCann.65:36
Effort on goal by Ashley Barnes from deep inside the area goes harmlessly over the bar.63:41 Goal scored
Goal! - Ryan Harley - Brighton 2 - 0 Peterboro Ryan Harley scores a goal direct from the free kick from long range to the top right corner of the goal. Brighton 2-0 Peterborough.62:55
Free kick awarded for a foul by Tommy Rowe on Ashley Barnes.59:52 Substitution
Substitution David Ball joins the action as a substitute, replacing Paul Taylor.54:33
Free kick awarded for a foul by Liam Bridcutt on Lee Frecklington. Direct free kick taken by Grant McCann.51:20
Craig Noone takes a shot. Save by Paul Jones.49:07
Craig Noone produces a header from inside the area that goes over the crossbar.45:18
Lee Frecklington decides to take the corner short.45:08
Lee Frecklington takes a shot. Lewis Dunk gets a block in.45:01
The second half has started.45:00 +2:09 Half time
Half Time The referee calls an end to the first half.45:00 +0:55
Corner taken by Lee Frecklington.45:00 +0:28
Inswinging corner taken right-footed by Lee Frecklington from the left by-line, clearance made by Ashley Barnes.40:59
Lee Frecklington takes a shot. Casper Ankergren makes a save.40:10
Craig Mackail-Smith gives away a free kick for an unfair challenge on Ryan Bennett. Paul Jones takes the free kick.37:42
Long range effort by Ryan Harley goes wide right of the net.36:39
Free kick awarded for an unfair challenge on Craig Noone by Ryan Tunnicliffe. Free kick crossed by Ryan Harley.35:02 Substitution
Substitution Ryan Tunnicliffe is brought on as a substitute for George Boyd.34:52
The ball is swung over by Gary Dicker.34:13
Ashley Barnes fouled by Mark Little, the ref awards a free kick. Lewis Dunk takes the direct free kick.31:57
The official flags Paul Taylor offside. Gordon Greer restarts play with the free kick.31:24
Mark Little fouled by Ashley Barnes, the ref awards a free kick. Free kick taken by Paul Jones.29:20
Ryan Harley takes the inswinging corner, save by Paul Jones.28:50
Gary Dicker fouled by Tommy Rowe, the ref awards a free kick. Inigo Calderon restarts play with the free kick.27:28
Inswinging corner taken by Ryan Harley.26:32
Unfair challenge on Craig Mackail-Smith by Ryan Bennett results in a free kick. Craig Noone crosses the ball from the free kick left-footed from right wing, Craig Alcock manages to make a clearance.21:33
Paul Taylor takes a shot. Save made by Casper Ankergren.18:40
Grant McCann takes a shot. Save by Casper Ankergren.17:30
Inswinging corner taken from the left by-line by Lee Frecklington, clearance by Ashley Barnes.17:10
Lee Tomlin takes a shot. Lewis Dunk gets a block in.16:30
Free kick awarded for an unfair challenge on Mark Little by Craig Noone. Direct free kick taken by George Boyd.15:01
Lee Tomlin gives away a free kick for an unfair challenge on Liam Bridcutt. Casper Ankergren takes the free kick.14:26
Ashley Barnes challenges Craig Alcock unfairly and gives away a free kick. Paul Jones takes the direct free kick.12:31
Foul by Craig Alcock on Ashley Barnes, free kick awarded. The free kick is delivered right-footed by Gary Dicker from right channel, Craig Alcock manages to make a clearance.11:45
Inswinging corner taken right-footed by Grant McCann played to the near post, save made by Casper Ankergren.9:57 Goal scored
Goal! - Craig Noone - Brighton 1 - 0 Peterboro Craig Noone fires in a goal from outside the area to the bottom left corner of the goal. Brighton 1-0 Peterborough.6:59
Effort from inside the box by Ashley Barnes hits the post.6:28
George Boyd takes a shot. Save by Casper Ankergren.3:33
Grant McCann concedes a free kick for a foul on Liam Bridcutt. Liam Bridcutt restarts play with the free kick.3:07
The assistant referee flags for offside against Paul Taylor. Gordon Greer takes the direct free kick.1:14
Ashley Barnes produces a right-footed shot from deep inside the penalty box which goes wide of the left-hand post.0:00
The referee gets the match started.
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