Sunderland have rejected a bid from Portsmouth for defender Nyron Nosworthy, Press Association Sport understands.
The Hampshire side are in the market for a defender, with 31-year-old Sylvain Distin set to complete a move to Everton.
However, Sunderland were unimpressed by Pompey's valuation of 28-year-old Nosworthy - a free transfer signing from Gillingham four years ago.
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