Chelsea have gatecrashed Arsenal's bid to sign Raphinha from Leeds United with a £60million offer.
Talks are at an advanced stage with former Chelsea midfielder Deco, Raphinha's agent, at the heart of negotiations.
Arsenal held talks with Leeds on Tuesday after their initial offer was rejected but have not come close to Chelsea's offer and the Brazilian is now poised to move to Stamford Bridge.
Arsenal have yet to indicate that they would be willing to match Chelsea's bid for Raphinha.