Arsenal boss Wenger admits Walcott may miss Barcelona
Wenger fears Walcott could also miss the game in the Nou Camp on March 8, with him also sitting out the FA Cup replay with Leyton Orient six days earlier.
Wenger said: "Walcott will be out for two to three weeks with an ankle problem.
"I would say it is very unlikely he will be fit for the second leg of the Barcelona game. I imagine the worst so maybe I will be surprised in a positive way but I just give you my gut feeling at the moment."