Manchester United's Antonio Valencia left with swollen eye lump after collision with Olympiacos' Joel Campbell (Photos)

Antonio Valencia looked worse for wear after a nasty collision with Olympiacos forward Joel Campbell in the early stages of the Champions League second leg at Old Trafford.

The Manchester United winger went up for a header on the edge of the Olympiacos penalty with the on-loan Arsenal forward and came off second best.

He had to receive treatment from the United physios, and a large lump appeared next to his eye after the incident.

Valencia was replaced by Ashley Young with 15 minutes remaining.

pictures after the break