Chelsea boss Maurizio Sarri signed Jorginho, Mateo Kovacic, Kepa Arrizabalaga and Rob Green this summer.
Keeping hold of Eden Hazard has been hailed as Chelsea’s best transfer business, according to Manchester United legend Rio Ferdinand.
Hazard was linked with a move away from Chelsea in the transfer window.
“A great advert for the Premier League,” Ferdinand said.
“Fantastic, the game ebbed and flowed.
“The best piece of business this Chelsea manager has done this season in the transfer window was keeping that man (Hazard) at the club.
“The quality he showed when he came on, changed the game in terms of the dominating of possession, making a difference in the final third, decision making.
“Truly world-class player.”