Jack Smith has tweaked his medial knee ligaments - even though the AFC defender went off holding his shoulder when he was stretchered off in the 3-1 defeat at Milton Keynes Dons.
AFC exited the Capital Cup to make it nought out of two at the stadium of their fiercest rivals, but boss Neil Ardley reckoned there were plenty of positives despite Smith's injury.
“I thought Bayo Akinfenwa was immense,” he told afcwimbledon.co.uk. “He’s not just a battering ram. One reverse pass that he played to put Matt Tubbs through was sublime and the skill he showed to help win the penalty was brilliant.
“There were lots of positives, but we have to dust ourselves down now.
“I asked for a bit more intensity in the second-half and I got it. Their second and third goals came when we were chasing the game and they came from bad mistakes. I would not want to crucify Alan Bennett though because I thought he was immense all game.”
The manager was unable to put a date for Smith’s return, but it looks doubtful he will play any part in Saturday’s trip to Luton.