Wilfried Zaha has handed in a transfer request at Crystal Palace, Sky Sports News understands.
Arsenal and Everton have been interested in signing the Ivory Coast international winger this summer.
Everton have seen a £70m plus James McCarthy and Cenk Tosun bid for Zaha rejected and remain interested in the winger.
It is understood that for a deal to happen Palace would have to compromise on their £80m valuation.
Zaha is understood to be very disappointed and disillusioned about the situation, according to Sky sources.
Arsenal had been keen on signing Zaha before they signed his compatriot Nicolas Pepe from Lille for £72m.
McCarthy and Chalov update
In terms of signings, Crystal Palace are edging closer to completing a deal for James McCarthy from Everton.
The Republic of Ireland international has undergone a medical.
Palace have also made an improved offer of £23m for CSKA Moscow striker Fedor Chalov.
Sky Sports News reported on Friday that the Eagles would need to up their bid after having £14m rejected for the 21-year-old over a week ago.
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It's Transfer Deadline Day for the Premier League and Championship on Thursday and Sky Sports will be bringing you all the latest news on who your club is signing.
Start your day with Deadline Day Breakfast (6am) ahead of a special Good Morning Transfers show (9am), with Deadline Day - The Countdown (4pm) taking you to the 5pm deadline. The Transfer Show - Deadline Day at 6pm will analyse the big moves before Deadline Day at Ten rounds up all the transfer headlines.
As well as tuning into Sky Sports News, don't miss a thing with our dedicated Transfer Centre blog.