Anderson's deflected strike gave Charlton a fourth minute lead and all three points seemed destined to head back to London before Sam Hoskins forced Isted into a mistake and presented Appéré with an empty net. Here are our player ratings from Sixfields...
9. Mitch Pinnock
Went as close as anyone when firing into the side-netting but he and his fellow attackers were otherwise completely blunted by Charlton, until the late mix-up... 6 Photo: Pete Norton
10. Kieron Bowie
Few defences have snuffed out his threat as successfully as Charlton did here. Embarked on a few forays but they came to nothing... 6 Photo: Pete Norton
11. Tyreece Simpson
Not his best game. The ball didn't stick up front and he was too often out-muscled and overpowered by opposition defenders... 5.5 Photo: Pete Norton
12. Ben Fox
Introduced at the break but struggled to turn the tide as Charlton remained in control... 6 Photo: Pete Norton