Manchester United boss Louis van Gaal admits Radamel Falcao could miss their clash with Chelsea.
The on-loan attacker, who started the game at West Brom on the bench due to suffering from jet lag after his international exertions with Colombia, will be desperate to face the leaders at Old Trafford but sustained a knock in training on Friday.
"He got a kick in the morning [on Friday] so we have to wait and see if he's fit enough," revealed Van Gaal. "But it's not a knee problem.
"He had a knee problem but not anymore. We have to build Falcao up, that I have also said in the first press conference when he came to our club.
"It is difficult because we are playing [games] already, that's difficult but we have played him because I like the way he was playing so we play with two strikers. Now I have to choose between two strikers, even three because [James] Wilson can also play, the younger player."
