Rangers have turned down a third offer from Turkish outfit Bursaspor for Steven Whittaker.
The reigning SPL champions confirmed on their official website that a bid of 750,000 euros (£657,000) has been knocked back.
The Gers have no interest in parting with the versatile Scotland international and have already turned down previous bids of 400,000 and 650,000 euros.
Bursaspor are keen to reunite Whittaker with former club-mate Kenny Miller, who was recruited in a £400,000 switch in January despite being Rangers' top goalscorer at the time.
However, the arrival of new owner Craig Whyte in May means Rangers are no longer under the same pressure to part with their prize assets.
New manager Ally McCoist has already made it clear that he sees the full-back, who can also operate in midfield, as an important part of his plans ahead of his first season at the helm.
Whittaker is entering the final year of his contract but discussions are taking place with his agent over a new deal.
Speaking earlier this month about a previous bid from the Turks, McCoist said: "I can confirm we had an offer from Bursaspor.
"I took a phone call from director Andrew Dickson to tell me about it.
"He didn't even tell me the figures involved because I told him that I wasn't interested in selling Steven.
"I have made it clear that Steven is one of the players I see as part of my long-term plans for the club.
"That is why we have opened talks with his representatives to extend his current contract."