Barcelona goalkeeper Marc-Andre Ter Stegen has returned to training although is unlikely to feature against Celtic.
Ter Stegen picked up a hamstring injury during a training exercise on Friday which ruled him out of the club's shock defeat by newly-promoted Alaves on Saturday.
However, the German returned to training on Monday, partaking in exercies alongside fellow goalkeepers Jasper Cillesen and Jordi Masip.
It is unlikely that the 24-year-old will play any part against Celtic, with Saturday's LaLiga trip away to Leganes a more realistic return.
Dutch goalkeeper Cillessen isset to retain his place for the Champions League clash on Tuesday.
