#3 Kepa Arrizabalaga
Few people would have predicted Kepa Arrizabalaga's Chelsea move to be such a disaster.
The Spain international became the most expensive goalkeeper in world football when Chelsea paid Athletic Bilbao £72 million in 2018. Signed as a replacement for the Real Madrid-bound Thibaut Courtois, it would be fair to say that Kepa has not enjoyed his time in the Premier League.
Consistent high-profile errors were not well received by Chelsea fans, and the board decided to sign Edouard Mendy last summer for nearly £22 million. Mendy is now the preferred goalkeeper for manager Thomas Tuchel. Kepa made just six Premier League starts last season and this deal has to go down as one of the worst in the history of the Premier League.
#2 Callum Hudson-Odoi
Callum Hudson-Odoi's talent has never been under question, but one has to wonder whether he will ever fulfill his potential at Chelsea.
Heavily pursued by Bayern Munich a few seasons ago, Hudson-Odoi decided to stay at Chelsea and penned a new deal in 2019. However, the England international has not cemented his place in the first XI, and remains a squad player.
A winger by trade, Hudson-Odoi has operated as a wing-back under Thomas Tuchel's management. The 20-year old did not sufficiently impress the German manager to nail down a starting spot during the second half of the season, and Bayern Munich have once again been linked.
#1 Tammy Abraham
Thomas Tuchel's treatment of Tammy Abraham has been surprising, to say the least.
A product of the Chelsea academy, Abraham enjoyed a good 2019-20 season with the club and was expected to build on that. Last season, though, Abraham barely featured under the management of Tuchel, who often left the striker out of the entire matchday squad.
The 23-year old made just 12 Premier League starts last season, scoring six goals and providing one assist. Chelsea are reportedly happy to let go of the striker, and Arsenal, Manchester United and West Ham United are all said to be interested in signing the England international.
Also Read: Ranking the 5 best Chelsea players in the last decade