The 19-year-old suffered a hamstring injury during the early stages of a Premier League fixture against Manchester United on April 18th and has not been able to return to full fitness.
His injury ruled him out of the World Cup as he didn't make Brazil's 55-man preliminary list under manager Carlo Ancelotti who does not want to risk the winger.
This week he revealed that Chelsea requested a meeting with his family to deliver the news as he burst into tears.
“Playing in the World Cup is a dream come true, everyone hopes for it. Even more so for me, since I was involved in the whole process. So that was a moment of great, great sadness in my heart. I cried so much in my parents' arms, no joke, I cried a lot. It's in moments like these that you need the people you love, and I'm very grateful for that.
“When I woke up, I went to take a shower, the doctor called me three times, the day he said he was going to give me a result. Then I called him and he said: ‘Bring your parents here because we want to talk to them too.’
“We already knew that if they were going to give any other news, they would say it right then and there, to my face, but when they told me to bring my parents there, I already had a feeling that something bigger was coming.
"I think the hardest moment was when I actually found out the news, that it was grade four. I didn't even know there was such a thing as grade four, I didn't even know it existed. But unfortunately it happened, but life goes on. Now it's about recovering well and getting treatment to get back as soon as possible."
Having already racked up 130 senior matches for club and country by the age of 19, a rest for the Brazilian may be good for him as he prepares to impress under new manager Xabi Alonso next season.