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But the Cameroon international, who has started just three league games for Barca since the turn of the year, is keen to eventually return to England.
"If I leave Barcelona it will be to return to the Premier League," the midfielder told BeIn Sport.
"I will return to England one day, that's for sure."
Song also sang the praises of Arsenal and Gunners manager, Arsene Wenger, but indicated a switch to "the best side in the world" was too good to turn down.
Song added: "He [Wenger] was like a father to me. He spoke a lot with me when I arrived to Arsenal.
"I wanted to renew my contract with Arsenal but in that case I would have regretted not joining Barcelona. Barcelona are the best side in the world."