The veteran winger signed for Feyenoord last week on an initial deal to the end of the season.
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However, work permit issues have prevented Sterling from joining training under Feyenoord coach Robin van Persie, says talkSPORT.
Sterling needs to hit the training pitch as soon as possible as he hasn't played any competitive football so far this season.
He joined Feyenoord as a free agent after being released from his contract at Chelsea last month.