Wigan Athletic have had a £1 million bid for Emmerson Boyce turned down by Palace.
The Premiership side made a move for the full back on Friday, having already snapped up Fitz Hall from the Eagles for £3m.
Boyce was Palace's player of the season last year, but Wigan will be hopeful of getting his signature on the cheap as the 26-year-old is in the final year of his current contract at Palace.