Estevao suffered his second hamstring issue of the campaign against Manchester United, an injury which was later confirmed to be a serious grade four tear of the muscle.
The injury ruled him out of the World Cup as he didn't make Brazil's 55-man preliminary list ahead of this summer’s tournament in what is a devastating blow.
Speaking about the chances of him being fit for the start of next season and the extent of his setback, Estevao revealed that he stunned the doctor with his progress so far.
"I had an injury where I tore 80 per cent of my hamstring bicep femoris. The Chelsea doctors wanted me to have surgery and even the Chelsea owner said he wanted me to have surgery.
“Two weeks ago, I had a second MRI scan, and the doctor asked if I was in pain or feeling anything.
“I said: 'No, doctor, I'm fine, I think I could even play already.'
“He said: 'Yeah, it really shows.' He showed me the exam image and said he couldn't see any more of the injury. He said he doesn't know what happened, because in the timeframe we're in, it shouldn't be that well-structured like it is.
"It's a procedure that will take time. God is in control."
After scoring eight goals across 36 appearances for the Blues last season, fans will hope the winger will recover back in time for the new campaign. For now, he must watch Brazil from the sidelines as the World Cup gets underway.