Zaha is a man in demand as the transfer window for Premier League clubs to make signings enters its final stretch.
Everton turned to Watford wideman Richarlison instead, and now Zaha is up for a move across London to Stamford Bridge.
However, the 25-year-old attacker has been tipped for a move again this summer after rejecting an improved £125,000-a-week contract and the Ivory Coast global has attracted interest from the upper echelons of the league with Tottenham and Chelsea linked in recent months.
However, Crystal Palace's valuation of their star player is somewhat astronomical. The Belgian wing wizard has been a long-term target for European champions Real Madrid and had expressed his desire to secure a move to Spain post his exploits in the summer's FIFA World Cup in Russian Federation.
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"That would lead to comments that we don't think he's good enough to play elsewhere".
As a result, the Ivory Coast worldwide has attracted interest from the likes of Chelsea, Borussia Dortmund and the Red Devils. He's very much an integral part of Crystal Palace.
Zaha contributed nine goals and three assists from 29 top-flight appearances last season.
If Chelsea do decide to go for the transfer then they will also have to pay-up when it comes to Wilfried Zaha's contract offer, with the 25-year old rejecting a £125,000-a-week deal with Palace. And signing Zaha, before Thursday's transfer deadline day, could prove to be a step in that direction for the Blues.