Riquelme has been on loan at Boca Juniors since February after falling out with Villarreal coach Manuel Pellegrini.
The talented playmaker was the catalyst for Boca´s successful Copa Libertadores campaign, and was expected by some to continue his career in his homeland on the expiry of the loan deal but with his contract at Villarreal tying him to the club until 2009, the Argentina international is obliged to return to Spain ahead of the coming Primera Liga campaign.
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