Sergio Aguero was forced off in the first half of Barcelona’s La Liga clash with Alaves on Saturday night at the Camp Nou.
The Argentine made his second start in a row for the Catalan giants but only lasted 40 minutes after going to ground holding his throat.
Television replays weren’t able to show exactly what happened to cause the problem but it did seem as though Aguero was having difficulty breathing.
¡Agüero sale al 40'!
Por un malestar en el pecho, el Kun Agüero tuvo que ser sustituido antes de finalizar el primer tiempo.