Gavi had to be replaced in the first half of Barcelona's 1-0 loss to Real Betis at the Camp Nou after receiving a blow to his head half an hour into the game.
The Barcelona prodigy lost his balance whilst on the ball and fell onto the ground, a couple of minutes after being hit on the head following a Hector Bellerin clearance.
Gavi, who also collided with Bellerin's knee while falling during the initial incident, was treated by Barcelona's doctors on the pitch and then stretchered off in the 36th minute.
Riqui Puig came off the bench to replace his teammate.