However, Belgian newspaper La Derniere Heure said Onyewu then left for Italy, where he was to meet with AC Milan officials to discuss a possible transfer to the San Siro.
Onyewu's contract contains a clause which allows the central defender to leave his club if a suitable offer materializes.
Standard are currently in Portugal on a mid-season training camp, with coach Michel Preud'homme admitting the U.S. Soccer Athlete of the Year was certain to leave the club during January.
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"I know nothing about his whereabouts. But I don't think he'll be joining us in training camp," Preud'homme was quoted as saying by Le Soir newspaper.
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