Thelo Aasgaard and Jonny Smith were both on target before Tom Eaves pulled one back. Here are our player ratings...
9. Mitch Pinnock
First half pretty much passed him by - something that could apply to most of his team-mates - before he became more involved in the second, although Cobblers continue to lack creativity when searching for an equaliser... 5.5 Photo: Pete Norton
10. Tariqe Fosu
Gave the ball away when he needlessly turned back into trouble and that led to Wigan's first. Struggled for effectiveness. His early season form has deserted him... 5 Photo: Pete Norton
11. Tyler Roberts
Hardly in the game before being hooked at the break... 5 Photo: Pete Norton
12. Aaron McGowan
On way earlier than scheduled but he did a fine job in the circumstances at centre-back. Miraculous goal-line clearance prevented it from going 3-0... 7 Photo: Pete Norton