QPR are expected to receive another bid from Crystal Palace for Alex McCarthy after rejecting an offer of £3m.
A bid of £3.5m would trigger a release clause in the contract McCarthy, 25, agreed when he joined Rangers from Reading a year ago.
He has made only four first-team appearances since that move and Palace boss Alan Pardew is keen to take him to Selhurst Park.
McCarthy is regarded as an excellent prospect but he has so far been unable to dislodge Rob Green as QPR’s first-choice keeper.
Green, 35, has a year remaining on his contract at Loftus Road and speculation that he could targeted by a number of Premier League clubs, including Chelsea, came to nothing.
Rangers have been aware of Palace’s interest in McCarthy for some time and identified several keepers as potential signings should he leave.
They included England Under-21 international Jonathan Bond before he was recently signed by Reading from Watford.