The playmaker has been sidelined since December – 22 matches – but has trained this week and now returns as they defend a 2-0 lead against the Croatians in the second leg of the round of 16 tie.
Speaking after training on Wednesday, Jose Mourinho told the club's website: “He's missed a lot of games, 22 games, around four months of competition, or so. It's a lot.
“We miss his quality, I also think we miss the character, because he's one of the guys with a competitive nature.
"We're very happy he's back."
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