The summer transfer window closed on August 31, and despite the financial constraints caused by the COVID-19 pandemic, a number of clubs spent big in the window in order to strengthen their squad.
Clubs in the Premier League were even more active than usual, and here, we rate the signings made by Chelsea in the window gone by.
1. Romelu Lukaku - €115m
Chelsea made one of the signings of the summer when they managed to lure Romelu Lukaku back to Stamford Bridge from Inter Milan, making him the most expensive transfer in the history of the club.
The Belgian's time in Italy has been extremely beneficial as he has established himself as one of the best strikers in the world and showed why he is so dangerous by scoring against Arsenal on his return to England.
Rating - 9
2. Saul Niguez - €5m (Loan Deal)
The Blues management made another brilliant signing in the form of Saul Niguez, late on deadline day - by bringing in the midfielder from Atletico Madrid on a season-long deal, with an option of signing him permanently.
The 26-year-old has established himself as one of the best players in Spain and has been an integral part of Atletico's first-team for over seven seasons.
His arrival will make Chelsea even tougher to break down in the center of the park.
Rating - 8
3. Marcus Bettinelli - Free Transfer
Marcus Bettinelli has the experience of playing in the Conference Premier, League Two, Championship and Premier League during his career so far, which led Chelsea to snap him up on a free transfer from Fulham.
The 29-year-old was signed arguably to be the club's third back-up goalkeeper.
Rating - 5