Vinicius says he cried as being injured it had been a "little difficult" for him to rediscover the form of last season.
He said, "I cried because after my injury it was a bit complicated. It was taking a long time to play as before. I was not so happy.
"Today I was calmer and nothing better than before a derby. After so many games, I had never been so many without scoring.
"I am delighted to have scored again."