Everton and Middlesbrough have both had £5m-plus bids for midfielder Sean Davis accepted by Fulham.
BBC Sport revealed earlier on Thursday that Fulham had finally decided to let the former England Under-21 international leave.
It will be up to Davis to decide which club he joins - but Fulham have insisted he cannot speak to either David Moyes or Steve McClaren until they have signed a replacement, likely to be Claudio Reyna.
"It is no secret that the club is talking to Sunderland regarding Claudio Reyna and is hopeful that an agreement for the American can be reached in the near future," read a statement on the Fulham website.
Premiership clubs have until 31 August to finalise their signings for the season.
And Everton boss David Moyes remains confident of fighting off competition from Boro to land Davis.
Moyes has made Davis his top summer transfer priority and is prepared to spend virtually all of his transfer cash on the gifted 23-year-old.
Middlesbrough are keen to buy the player, but BBC Sport understands Davis prefers a move to Goodison Park.
Davis is currently sidelined with a knee ligament injury, but is expected to be fit within a fortnight.
If the deal goes through, Everton will press ahead with a bid to sign Real Madrid's Steve McManaman.
Everton will attempt to lure McManaman to Goodison Park if they can make room on their wage bill by clinching a loan deal for Alex Nyarko, who is in talks with Chinese clubs.