The news of N'Golo Kante's injury setback is a huge blow for CHelsea.
The midfielder picked up a knee injury against Watford at the start of May and has yet to fully recover from the problem.
Despite not being fully fit, Kante started the Europa League final against Arsenal but then missed France's June internationals due not the fact he hadn't fully recovered.
Kante was then named in Frank Lampard's 25-man squad for their pre-season tour of Japan, but it seems that the injury has reared its head again as the midfielder has flown back to London early.
"N’Golo Kante has travelled back to the UK to continue his rehabilitation for an injury connected to the knee problem he sustained at the end of last season," read a statement on the club's Twitter page.
As you'd expect, the news of Kante's injury blow has worried the Chelsea fans.
Here's what they had to say on social media.
