Chelsea are keen on signing Jules Kounde after failing to sign Nathan Ake from Manchester City.
Chelsea had seen a bid for Kounde rejected earlier this week, and the Blues have come with an improved offer for the 23-year-old.
Chelsea were believed to have tabled around £50m for Kounde which was rejected by Sevilla.
Transfer expert Fabrizio Romano had confirmed that Chelsea have submitted a fresh bid for Kounde.
He said: “Chelsea have submitted a new bid for Jules Koundé today: £55m fee, very good payment terms. Talks now ongoing with Sevilla on structure of the bid.
Spanish transfer reporter Jose Manuel Garcia has gone on to claim that the bid has been accepted.
He tweeted: “Sevilla accepts Chelsea’s offer: £55 million (€64.5), including bonuses. Koundé will be a Stamford Bridge club player until 2027.”