As always with a weekend of action in the Premier League it throws up its heroes and villains. Having looked at the heroes already, here are the villains - whose actions may have cost their side dearly this season:
You could have selected several candidates from the Chelsea side including Ramires for his elbow on Sebastian Larsson which wasn't seen by referee Mike Dean or the reaction of assistant boss Rui Faria after Sunderland were awarded a penalty for Azpilicueta's foul on Jozy Altidore. Azpilicueta lost possession and then ended up putting in a lunge on Altidore which forced the Sunderland forward to go to ground. Just how costly will that lunge turn out to be for Chelsea in the title race?
It was another awful weekend for Manchester United during this season as their 2-0 defeat to Everton turned out to be their last game under David Moyes. But Jones had a nightmare afternoon at the back for United as his handball gave away the penalty which opened the scoring for the Toffees. He wasn't the only culprit for United on Sunday afternoon as Alexander Buttner also had a poor game amongst many others in a red shirt at Goodison Park.
His challenge in the game between West Ham United and Crystal Palace was crucial to the outcome in this contest as he brought down Cameron Jerome on the hour mark - which allowed Mile Jedinak to convert from the penalty spot to give Palace all three points and to keep their excellent run of form going. West Ham should be safe, but something from the game would have cemented their place in the Premier League for next season.
With the game against Swansea City locked at 1-1 going into the closing stages, the last thing Newcastle United will have wanted is one of their players to needlessly lunge into a challenge and give away a penalty - and that's what Tiote managed to do. Newcastle haven't been in the best of form recently, and the challenge allowed Wilfried Bony to win the game for Swansea, and pile even more pressure on manager Alan Pardew.