The Wigan and Scotland midfielder is wanted by a number of Premier League clubs, and could return to the top flight in a deal worth around €9 million on deadline day
Crystal Palace are set to beat Leicester City and Burnley to the signing of midfielder James McArthur, Goal understands.
Leicester agreed a €9 million fee with Wigan to sign the midfielder, who has been with the DW Stadium side since 2010, but Palace were given permission to speak to McArthur over the weekend and are now the favourites to sign the 26-year-old.
Burnley also made a move for the Scot earlier in August, but were told by Wigan that the player was not for sale.
Palace are looking to make a number of signings following the arrival of Neil Warnock, who replaced Tony Pulis amid reports of a disagreement over transfer policy with chairman Steve Parish.
Wilfried Zaha has returned to Selhurst Park on a season-long from Manchester United having failed to break into Louis van Gaal's first-team plans.
And Tottenham defender Zeki Fryers has also been pictured at the Palace training ground ahead of a move away from Spurs.
The south London club have also tied down winger Yannick Bolasie to a new contract.