Alexis Sanchez doubtful for El Clasico

Barcelona forward Alexis Sanchez could reportedly miss Saturday's El Clasico against Real Madrid through injury.

The Chile international came off during the second half of Barca's Champions League semi-final first-leg defeat at Chelsea with a minor knock.

The former Udinese player is expected to undergo tests on Friday to determine the extent of the problem, according to Sport.

Barcelona can move to within a point of leaders Madrid with a win at the Nou Camp this weekend.