Real Sociedad midfielder Luca Sangalli is in hospital after suffering a mild stroke, the Spanish club have said
Sangalli made his senior debut for his hometown club in August and scored his first goal against Athletic Bilbao in the Basque derby in October.
A stroke occurs when the blood supply to part of the brain is cut off.
Real said Sangalli was "conscious, eating without any problems and recovering well".
"He is going to have several medical tests in the following days to find the cause," they added.
Sangalli has played six games this season, most recently on 27 October in a 2-0 defeat to Atletico Madrid.