Hudson Odoi apparently tore his achilles yesterday. Feel for the kid but that's a massive blow to Chelsea who cant even get a replacement. That kind of injury couple hundred minutes into his professional career doesn't bode too well either, not like Koscielny who's put in hundreds of miles on inflamed heels.
Chelsea's doctors are well dodge so I wouldnt be surprised with another miracle recovery but this probably means he won't step on another pitch this year, which means in turn they'll have Willian and Pedro for the wings next season.