A close friend of Chelsea defender Trevoh Chalobah has taken aim at the club's fitness staff.
Ed Hodge, a football performance coach, is close to Chalobah and has taken to social media with his concerns about Chelsea's pilates instructor.
Hodge wrote: "Really concerned to see @chelseafc have an inexperienced reformer teacher on site teaching pro players.
"1. You DONT wear sneakers! Never!!
"2. Coxis (tailbone) should be planted in this manoeuvre and not lifted.
"3. Arms should be rested by your side... (And more wrong with this picture).
"If you are taught Reformer Pilates incorrectly you are going to have injuries. I have said time and time again that you should only use highly qualified professionals. This is very worrying to see."
Chalobah has only just returned from a long-term injury.