Chelsea midfielder Tiemoue Bakayoko has joined former club Monaco on a season-long loan, with an option to buy.
The 25-year-old signed for the London club from the Ligue 1 side for a reported £40m in 2017.
He went on to make 43 appearances that season but spent last year on loan at AC Milan.
The Paris-born international was part of the Monaco squad which won the French title in 2016-17.
Bakayoko signed a five-year deal at Chelsea when he moved to Stamford Bridge.