Less than two weeks until cup game.
The U's will be seeking revenge, after Posh ran out 3-1 winners in the league game at the Weston Homes Community Stadium.
Plenty of fans bought their tickets after the weekend fixture against Coventry City, as the U's look to make it through to the Third Round for the first time since the 2010/11 season.
Tickets are selling well for the FA Cup game against Peterborough United on Sunday December 7th.
. www.colutickets.com You can buy tickets by popping along to the Weston Homes Community Stadium, calling 0845 437 9089 or booking online at