The Eagles are hoping to wrap up a deal to bring Tottenham's Zeki Fryers to the club as well as Wigan's James McArthur well before tonight's transfer deadline.
Fryers has fallen down the pecking order at Spurs since Mauricio Pochettino arrived and brought in Ben Davies, and the former Manchester United man is now expected to join Neil Warnock at Crystal Palace.
The 21-year-old is undergoing a medical at the club ahead of a permanent switch to Selhurst Park for around £3 million while James McArthur is also believed to be close to joining.
The Wigan midfielder had also been pursued by Leicester but the chance to move to London and link up with Palace was a more attractive option.
McArthur is poised to complete a club-record £7 million switch to Palace from Wigan today as Neil Warnock looks to reshape the side.
The Eagles could be one of the busiest clubs today and a move for Queens Park Rangers playmaker Adel Taarabt is also being suggested.