Arsenal mounted an extraordinary comeback to take their League Cup fourth-round tie at Reading to extra time on Tuesday, recovering from 4-0 down to equalise in the fifth minute of stoppage time. After a dreadful start, Arsenal fell four goals behind inside 37 minutes, but goals from Theo Walcott, Olivier Giroud and Laurent Koscielny brought them back into the game, before Walcott made it 4-4 in the 95th minute.