Christopher Nkunku has vowed to "give everything" for Chelsea after completing his move to Stamford Bridge.
Manchester United have made another improved bid for Chelsea midfielder Mason Mount, according to reports.
Chelsea's owners BlueCo have agreed to buy a stake in Ligue 1 club Strasbourg in their plans for multi-club ownership.
Arsenal have come to an agreement with Chelsea over German striker Kai Havertz's transfer fee.
Manchester United have made an improved bid of up to £50 million for Mason Mount as talks continue with Chelsea.
Arsenal are closing in on Chelsea forward Kai Havertz, while also preparing a third bid for West Ham skipper Declan Rice.