Opposition view: Luke Williams questions Peterborough's 'mentality' despite derby victory over Northampton

Cobblers lost Jack Perkins to an early red card and Harry Leonard’s brace either side of the break put Posh on course for a seemingly comfortable and dominant victory, but Tom Eaves pulled one back and the visitors had chances to nick an equaliser.

"There's some good and some bad and the last half an hour was disappointing,” admitted Williams. “The mentality of the team was wrong and that’s a problem. There was some very disappointing stuff after they pulled a goal back.

"I have no idea on the red card, I had the worst view in the stadium so don’t ask me about that, but I genuinely thought it was a big shame for the game and it was a shame for them because this game means a lot to them and it’s terrible to suffer the setback so early. It obviously changed the course of the game and we don’t know what would have happened had it been 11 versus 11.

"I was disappointed we didn’t take our chances and that’s something we need to learn from but we scored at a brilliant time just before half-time and then again early in the second half, but from then on it was disappointing.

"We anticipated that they would change it at half-time, Northampton did everything they could to come up with solutions, but it's on us. They were smart in how they reacted to the red card and they did everything they could in the situation but it was down to us.

"We made an error that led to the goal and then the emotion is wrong. They need to be more in control than that because we played on fear and that’s a terrible emotion to play football.

"Tom Eaves came on and he’s a very good player and caused us a lot of problems but we should have dealt with him better.”