Barcelona will make a late call on the fitness of Alejandro Balde ahead of his return to the UEFA Champions League.
The Blaugrana return to European action on November 26 at home to French side Stade Brest with Balde facing a battle to be fit.
Flick opted for Gerard Martin in his place but the 22-year-old was replaced at half-time after a tough night in Galicia.
According to the latest update from World of SportsFlick will assess Balde's fitness in training tomorrow, before making a call.
Martin's struggles against Celta Vigo they have increased the need for Balde to return, but Flick is worried about aggravating his injury if he is returned too soon.
Hector Fort is an option to cover at left back, if Balde misses, and Martin drops to the bench.