Chelsea have completed the signing of France international midfielder Tiemoue Bakayoko from Monaco for a reported fee of £40 million.
Arsene Wenger has said he expects Kylian Mbappe to remain at Monaco and confirmed Arsenal had not made a world-record bid for the teenage striker.
Serge Aurier, Hatem Ben Arfa and Grzegorz Krychowiak have all been left out of Paris Saint-Germain's squad for the International Champions Cup.
Mainz have announced the signing of defender Abdou Diallo from Monaco on a five-year deal for an undisclosed fee.
Tiemoue Bakayoko will undergo a medical after travelling to London to finalise a £40m move from Monaco to Chelsea, sources have told ESPN FC.
Olivier Giroud has been linked with a move since Arsenal signed Alexandre Lacazette. Each club linked with the striker makes their sales pitch to him.