The midfielder feels he is proving he can make a big contribution at City.
Nasri, who hit the opening goal in their FA Cup semifinal win over Chelsea, told City TV: "I wish I was like this since the start of the season but I had a couple of injuries which stopped me.
"Now I am playing really well, really great. I am full of confidence.
"I try to do my best for the team and we are going to fight until the end for the league and we want to win the FA Cup. It is the right moment."