Bradford City booked their place in the quarter-finals with a shock penalty shoot-out victory at Wigan Athletic.
A Latics side featuring nine changes from Saturday's Premier League victory over West Ham created a host of opportunities but could not make a breakthrough during the 90 minutes or in extra-time as their League Two opponents held on for spot-kicks largely thanks to goalkeeper Matt Duke.
Shaun Maloney then blazed his penalty over and Jordi Gomez saw his saved as the visitors advanced to the last eight of the competition. Wigan looked comfortable in the early stages and thought they had taken the lead in the 10th minute when Ivan Ramis, captain for the night, headed home Gomez's free-kick, only to see the referee's assistant raise their flag.
Bradford struggled to get into the game, but after Nahki Wells almost pounced as Ali al Habsi rushed to clear away a poor back-pass by Ramis, the visitors seemed to grow in confidence.
Wigan almost grabbed the lead right at the end of the first half, though, when Gomez met a lofted ball into the area first time, bringing a good stop out of Duke.
Duke was called into action late on to keep Maloney at bay before it was confirmed that a shootout would be required. Bradford were unerring with their spot-kicks, but Maloney ballooned his over before Duke blocked Gomez's attempt to send Wigan crashing out and the visitors through.
Man of the match Duke.
Match rating 6/10.
Referee R East (Wiltshire).
Attendance 11, 777.