Yury Zhirkov has hit out at Chelsea's medical staff.
The Russia winger is considering his future at Stamford Bridge.
"I haven't played for a really long time," he told Sport Express. "In the final games of the season in England, I wasn't even able to come on as a substitute."
Adding that he "feels fine physically", he said: "There was no particular injury problem. I had to miss three days before everything healed but the doctors for some reason decided that, even by the end of the season, I had never recovered.
"Sometimes our doctors just don't understand. I trained fully, but they argue that 'Zhirkov is injured and not ready to play in matches'. Where's the logic? If I'm not limping anymore and can withstand training, then why shouldn't I get through games? Frankly, it hurts me even to talk about it and I don't want to discuss it."