On Monday morning, the France international was introduced to his new team-mates following a £40 million move from Monaco.
However, he was only walking around the training ground with his flip flops, as the defensive midfielder had a knee injury which prevented him from taking part in training.
Bakayoko has become the second-most expensive player in Chelsea's history and third signing of the summer, following Antonio Rudiger's arrival from Roma and Willy Caballero from Manchester City.
Chelsea welcome Tiemoue Bakayoko to his first training session... but knee injury prevents him from taking part https://t.co/RfaxbkcePr pic.twitter.com/BEetAFNgBs
— MailOnline Sport (@MailSport) 17 de julio de 2017