The 20-year-old is a West Ham target and the Hammers have been trying to get a deal done to take him to the London Stadium.
West Ham have agreed a fee with Lille for Onana, which would be worth a total of €40m to the French side.
But West Ham are yet to agree on personal terms with the player and are now facing the prospect of seeing the deal hijacked by Everton.
Onana’s entourage are clear that their client wants a Goodison Park move and told Belgian daily Het Nieuwsblad: “Amadou wants to go to Everton.”
The Toffees want to sign another midfielder following the imminent return from Idrissa Gueye from Paris Saint-Germain.
Onana is the player they want and the player prefers a move to Everton over West Ham this summer.
The Merseyside club are quietly confident of getting a deal done given the fact that Onana wants to move to Goodison Park.
West Ham are still in the race but Everton have their nose ahead in the pursuit of the midfielder.