Gareth Bale trained with Real Madrid on Monday, sparking suggestions he might be available to face his old club in the Champions League.
Bale has been struggling with a calf injury of late and had been expected to miss the game at Wembley on Wednesday night.
He was absent from the Real squad which was beaten 2-1 by minnows Girona on Sunday and there have been reports that he could be out until mid-November.
However, his presence in a session on Monday has given rise to the idea that he could be on course for a quicker-than-expected return to full fitness.