Zaha informed the club he wants to leave, but Palace have replied only a massive offer will convince them to sell.
Palace had offered the Ivorian worldwide a new £125,000-a-week deal in a desperate attempt to keep hold of their Player of the Year, but it seems the bright lights of Stamford Bridge are too appealing for the 25-year-old. Tottenham are also interested in the Ivory Coast worldwide.
A switch to Everton fell through earlier in the summer when Zaha decided he wanted to remain in London. His improvement over the last three seasons has been so astounding that he is now considered to be among the best attacking players in the Premier League.
Mauricio Pochettino is yet to make a single signing this summer but the Tottenham boss is expected to be busy over the coming days trying to strengthen his squad and Zaha was among the players on his radar.
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And new manager Sarri is keen to resolve their situations in person with both having hinted at a desire to leave Stamford Bridge. The London club feel that offer is derisory given Courtois' quality despite the short amount of time left on his deal.
It is thought that Chelsea want to sign Zaha as a pre-emptive replacement for Eden Hazard, who is keen on a move to Real Madrid.
The Ivorian forward, who was a key figure for the Eagles last term, was reported to have told his teammates that he wants to move to Chelsea.
Tottenham have long held an interest in the talented winger, while Chelsea have also emerged as a potential destination for the player.
That deal would have increased his wage to £125,000 per week, but Zaha is well aware that he could earn significantly more at Stamford Bridge.
According to Mirror Sport, the Ivory Coast global has also reportedly told his Palace teammates of his plans, and would be willing to submit a transfer request should the club continue to price him out of a move.