Barcelona confirm that centre back Samuel Umtiti has picked up a injury to the soleus of the right leg.
The injury came about in Saturday's individual training session at the Ciutat Esportiva Joan Gamper.
His progress will determine his availability for the coming workouts.
Since arriving at the Camp Nou in the summer of 2016, the Frenchman has missed a total of 58 matches in all competitions as a result of various issues, although the most serious has been with his knees.
Umtiti is one of the players Barcelona have made available for transfer this summer, since he has missed lots of matches and been unable to regain rhythm as a result of his persistent injuries.
This season, for instance, he has played in just 16 games.
The plan is to either sell Umtiti for a fee or to include him in a swap deal to lessen the cost they would have to pay for a player.
Barcelona have taken precautions to avoid injuries by planning sessions that gradually increase the workload and intensity, with Quique Setien giving his players the day off on Sunday, but these measures have not prevented Umtiti's injury.