Peterborough United missed the chance to go top of League One as they were held by managerless Sheffield United.
Blades caretaker boss Chris Morgan took his fourth point in three games since replacing David Weir.
Danny Swanson and Tyrone Barnett missed chances for Posh, before United's Lyle Taylor struck the bar from 25 yards.
And neither side could find the breakthrough in a dull second half as Sheffield United collected their first away point of the season.
Britt Assombalonga's late effort for the hosts was blocked, as Posh drew level on points with league leaders Leyton Orient,
who lost their first game of the season at Coventry.
VIEW FROM THE DRESSING ROOM
Peterborough United manager Darren Ferguson told BBC Radio Cambridgeshire:
"It was very frustrating for us - they just parked the bus.
"I was really surprised. I didn't think Sheffield United would play like that against us.
"It probably shows how far we've come.
"It was slightly frustrating in terms of breaking them down. But it's another game unbeaten."
Sheffield United caretaker manager Chris Morgan tells BBC Radio Sheffield:
"I think it's an excellent point, we knew it wasn't going to be an easy task.
"They [Peterborough] have been flying, you know second in the league.
"But in general we were excellent tonight, we gave them a plan they worked at it.
"To a man they stuck to it and in the end with Jamie Murphy on the break we could have nicked it."
Peterborough United 01 Olejnik 02 Alcock 03 Ntlhe 08 Payne 05 Zakuani 06 Bostwick 07 Swanson (Mendez-Laing - 63' ) 11 McCann (Assombalonga - 72' ) 23 Barnett 14 Rowe Booked 12 Taylor Substitutes 04 Brisley 09 Assombalonga 13 Day 17 Newell 19 Mendez-Laing 20 Knight-Percival 36 Jeffers Sheffield United 25 Long 29 McMahon 22 Lappin 14 McGinn 05 Maguire 15 Collins 07 Flynn Booked (Westlake - 87' ) 17 Coady 10 Taylor (King - 71' ) 08 Doyle 19 Brandy Booked (Murphy - 78' ) Substitutes 01 Howard 02 Westlake 12 Miller 16 Cuvelier 18 King 20 McGinty 23 Murphy
Ref: Roger East