The 30 year old, returned to the national side ahead of ICC World T20, after battling cancer, and has never looked back ever since he made his comeback though many raised doubts about his fitness.
Further, Yuvraj also made it clear that he need not prove anybody wrong with the recent double ton in Duleep Trophy match against Central Zone.
"My biggest challenge today was batting till the end. I am very happy to get a double hundred," he said after scoring 208 on Monday.
Yuvraj added that he was not worried about critics, but concentrated on the game, which helped him achieve all these in a short span, after battling cancer.
"It is easy to criticize. I don't really think of my critics. If I did, I would not be able to concentrate on my game. My job is to bat and get runs, do my bowling and fielding. I'm not trying to prove anyone wrong. I am only trying to come back to my normal self," he said.
Talking about his 333-minute stand, as he faced 243 deliveries to score 208 runs for North Zone in the Duleep Trophy match said he would work hard and perform better in the next match.
"I feel good. I feel happy about the way my body kept on going. I was enjoying my batting till the afternoon. I was tired at the end of the day's play on Sunday, which was understandable. I had batted for 200 minutes in my first game (on return to domestic circuit). I'm sure if we qualify for the final, I will have more time to bat and get better. I am sure the more I play, the fitter I will become," he added.
When asked if his recent knock would help him earn his Test berth again, Yuvraj said, he would take one game at a time and ensure that he performs well and not think about anything else.
"I'm not thinking of what is going to happen in the future. I'm taking one game at a time. If I am fit enough and doing well, then it is not my call. It is my duty to go there, spend time at the crease and get my body fit for the four-day or five-day game. That is what I'm doing now."