The knee setback also means Rodrygo is out of Brazil's World Cup campaign this summer.
He posted to social media this morning: "It's been one of the worst days of my life. As always, I was afraid of this injury...
"Maybe life has been a bit cruel to me lately... I don't know if I deserve it, but what can I complain about? I've experienced so many wonderful things that I didn't deserve either...
"A major obstacle has arisen in my life, in my career, and that prevents me from doing what I love most for a while. I'm out for the rest of the season with my club and out of the World Cup with my country, a dream that everyone knows how much it means to me. And all I can do is be strong as always, that's nothing new."
Rodrygo also stated: "Thank you all for the prayers, texts, and love! You are so important to me... Although this is a very difficult time, I promise not to stop here.
"I believe I still have many amazing things to experience and to make everyone who believes in me happy. This is just a 'see you soon'... God is still in control of everything."