Joao Felix has limped of the field in his Atletico Madrid La Liga debut, after suffering an apparent ankle injury.
The Portugal international joined Atleti in a €120m (£113m/$142m) deal over the summer but was unable to finish his debut, being replaced by another new boy in Marcos Llorente after 65 minutes.
Felix had won a penalty earlier in the game after a mazy dribble, but Alvaro Morata missed the spot-kick.