Robinho is a major doubt for Manchester City's vital Premier League clash with West Brom after suffering a recurrence of an ankle injury in Thursday's 3-1 defeat by Racing Santander in the UEFA Cup.
The Brazilian had to be taken off at half-time after making a surprise start in Spain and could now miss the entire festive programme.
City boss Mark Hughes said after the match: "Robinho wasn't able to continue so he's a big doubt for the weekend. It's his ankle again.
"He's made a great impression on everyone in Manchester, scoring eight goals in the Premier League. We're delighted with his impact.
"In the last three games he's been struggling with an injury and that was a concern to him tonight. We're pleased with what he's produced."
Despite the defeat, City move into the knockout stages of the competition after finishing top of the group, and Hughes added: "Ideally we'd have preferred to have won the game but credit to Racing, they're a good team.
"Their motivation was to try and get into the next round. We'd already qualified so that might have taken a little bit of edge out of our game.
"We made changes as we wanted to give the likes of Shaun Wright-Phillips, Stephen Ireland and Vincent Kompany a little bit of a rest. I think that was important given the number of games coming up. They're key players for us.
"In the second half we just needed to steady ourselves and we did that. We got more games into some of the players who haven't had a lot of football.
"Gelson (Fernandes) got 90 minutes which is important while Caicedo has come on and made an impression. We have to take the positives out of the game.
"We've topped the group and that was the order of the day. We're grateful for that."