McGeehan scored shortly before the half-hour mark and then again with six minutes to go on a wonderful Sixfields night. Here are our player ratings...
5. Akin Odimayo
There were a few teething issues in the new system and maybe he could have been more alert when Mothersille tapped home but that would be nit-picking because otherwise he had an excellent game. Showed impressive staying power and endurance to contribute at both ends of the pitch all the way until full-time... 7.5 Photo: Pete Norton
6. Mitch Pinnock
This was more like it. His engine and stamina makes him a good option at wing-back, even if he's not the most natural defender, and his delivery always means he'll be a threat in the final third. Great corner for McGeehan to score and then delivered the cross that led to the winner... 8 Photo: Pete Norton
7. Samy Chouchane
A contender for his best game in claret. Displayed a real tenacious, ball-winning side to his game that hasn't always been evident. Stuck close to Randall and limited his impact on proceedings. He'll always produce quality on the ball too. An impressive midfield display... 8 Photo: Pete Norton
8. Will Hondermarck
Clear why Sampson brought him back for this game. His athleticism and running power were useful traits as Cobblers set up to press high and go hard at Posh. He covered a lot of ground before being withdrawn on the hour... 7.5 Photo: Pete Norton