Sunderland have opened formal negotiations with French club Rennes over a club record move for Ghana international striker Asamoah Gyan.

Press Association Sport understands the Black Cats are in talks as they attempt to recruit a replacement for Kenwyne Jones ahead of Tuesday's transfer deadline.

Their need became more acute today when Fraizer Campbell, who had been partnering Darren Bent, suffered suspected knee ligament damage during the 1-0 Barclays Premier League victory over Manchester City.

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