The naturalised Italian midfielder is set to play at the Nou Camp for the first time since he was sent off playing for Inter Milan in the 2010 semi final.
His presence will be useful for Paris St Germain, who are missing Blaise Matuidi.
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Chelsea legend Didier Drogba has revealed his top 11 Chelsea career moments during his recent interview on Chelsea TV.
The start of the 2017-18 Premier League season is just around the corner and is shaping up to be one of the most competitive yet.