Sheffield United threw away a point against fellow League One promotion contenders Peterborough.
There Blades looked to have snatched a draw in a game they dominated large periods of, when Jack Baldwin made it 2-2 with an own goal with six minutes remaining.
However, Martin Samuelsen inexplicably found a way through United's defence to score a winner for Posh.
Here are SIX things we learned from the match...
Defence still needs a bit of work
Probably obvious to start off with, considering they conceded three at home, but up until Saturday, the Blades' backline had looked like it had shaken off the bad habits of earlier in the season. The thing is a change in personnel would arguably have little effect. Is there anyone available who would strengthen that United defence? I'd doubt it. The current players just need to learn to maintain their focus right to the end. Or, if you've just scored and someone is running at you from the restart, kick him into Shoreham Street!
Balance of grit and guile still hasn't been perfected
There were a few weeks of grind against Barnsley, Oldham, Coventry and Scunthorpe, then came an excellent display of fight and flair against Bradford. In the match against Posh, though, United at times forgot the basics that had helped them pick up a string of 1-0 victories. It would be unfair to put that solely on the defence, for Peterborough's attack-minded players were given plenty of space to score the goals they did. Maybe best to go back to the start again and dig in.
Brayford/Coutts partnership can be a huge hit
United didn't play that badly on Saturday so we shouldn't concentrate on the negatives. For a start, the John Brayford/Paul Coutts link-up on the right is a joy to watch. The two players are developing an excellent partnership which has been getting better and better with each passing week.
Matt Done badly missed
Speaking of linking up, that's what was missing at various times. Matt Done's injury, picked up against Bradford the previous week, denied United a natural connection between midfield and attack. Done doesn't stop running - he finds space for others, draws out defenders, picks out pin-point passes and has en eye for goal himself. The Blades needed more of that on Saturday.
Maybe Jose Baxter could fill that role
Interestingly when Conor Sammon came off, Nigel Adkins elected to play Jose Baxter in a forward role. It was similar to that which Done plays and the two have similar traits, though Baxter lacks his team mate's energy. However, Baxter is one of the best passers in the division and he too could provide those balls through the middle that Billy Sharp thrives on. If Done doesn't make it against Manchester United then the Scouser could well play that position.
Martyn Woolford getting better...what does that mean for Che Adams?
Like many of the players brought in by Adkins, Woolford took time to settle. But over the past few weeks the West Yorkshireman has shown improvement game-by-game. His passing and crossing is much better than earlier in the campaign and he covers well down that left side, backing up Jay McEveley (also showing vast improvement). It makes things difficult for Che Adams who lost his place in the team after being sent off against Oldham. Adams is a completely different player...more skillful and more likely to score. He won't, however, have the same defensive discipline as Woolford. It's an interesting quandary for Adkins.