Speaking to ESPN Brasil, the Brazil international admitted that his personal life got in the way of his football career at Old Trafford.
"I think that, apart from my football life, my personal life got in the way a lot, because of the things I went through, the moments I lived there," he said.
"Like it or not, it's affected me a lot. So, of course, I know the potential I have. It's not for nothing that I went to a World Cup, it's not for nothing that I was sold to United for a lot of money, and I know my worth."
"People look at the moment, but they don't look at the bigger picture, what happens to bring things about."
"So, as I said, my feeling at United was that I had good moments, bad moments too, but of course I could have done more, I could have done better."
