England captain David Beckham is doubtful for Real Madrid's Champions League game against Juventus after suffering a back problem.

Although Beckham played in Real's 1-1 draw against Valencia, he came off in the second half and afterwards revealed that he was not fully fit.

"I woke up on Saturday morning and could feel my back," said Beckham.

"I had to have a lot of work and injections on it before the game. It hasn't really responded."