Barcelona coach Luis Enrique says Lionel Messi will decide if he is fit enough to play in Wednesday's Copa del Rey quarterfinal first leg tie at Athletic Bilbao.

Messi was substituted at half-time after scoring early as Barca hammered Athletic 6-0 in Sunday's La Liga meeting between the sides.

The club's medical staff have said that Messi had not suffered any hamstring injury, just took a knock, but the Argentine did not take part in Tuesday's group training session and so remains a serious doubt for the game at San Mames.

The Blaugrana coach told his pregame news conference that a decision on Messi's participation would be taken after consulting with the player on the morning of the game.