German club Bayern Munich are still sweating on the fitness of Dutch winger Arjen Robben ahead of tonight's Champions League clash with Manchester United.

Robben sustained an injury during the weekend's loss to Stuttgart and is under a cloud of uncertainty going into the quarter-final first leg with Munich boss Louis van Gaal he will play no part unless he is 100% fit.

"We're doing everything we can to make sure Robben is fit," said van Gaal. "But I don't want to take even the smallest risk.

"He has to be absolutely fit and only then will I put him in the team. His muscles are tired and I have to be absolutely sure he is 100 per cent fit.

"It's a big game and we can't afford to have a player who is only 80 per cent fit."