"He'll be out for about three weeks. Hopefully he might be back for a couple of games towards the end of the season," manager David O'Leary told the club's official website.
"He's been playing with a knee injury and I think the Colombian trip last week, with the air pressure, the travelling, the game, coming back and playing with it. It's finally taken its toll.
"So he'll be out for about three weeks and that's obviously a blow when you look at our squad and where the goals have come from this season."