Messi suffers potential knee injury against Benfica

The Blaugrana star was brought on in the second half as a substitute but was forced to withdraw late in the game, leaving his chances of equalling Gerd Muller's record in doubt

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Lionel Messi will undergo medical tests after being stretchered off with a bruised left knee in Barcelona's 0-0 draw with Benfica in the Champions League on Wednesday, the Catalan club have confirmed.