Yet the Scot insisted he would still need to improve to lift the title.
Murray advanced to the fourth round with a straight-sets 6-2 6-3 6-4 victory over the Serb on Centre Court and looks in good shape to maintain his bid to become the first British winner of the men's singles since 1936.
He said: "That was very good. I felt a little bit uncomfortable at the start, it was very different conditions to the other day. The clouds came over, it was
raining a little bit and there was quite a lot of wind, but after the first set I felt more comfortable. I'm very happy with the first week, I got better with every match."
Asked to grade his performances, the 22-year-old Scot added: "All you have to do is win, I really don't mind if I play terribly as long as I come through in the end.
"I'll have to give myself an A for coming through the first week, each win is a big one here but I'm going to have to play better next week if I want to come home with the title."
Murray is seeded to meet five-time champion Roger Federer in the final following the withdrawal through
injury of defending champion Rafael Nadal, but he insisted he was not looking too far ahead.
He added: "I expect a lot of myself. If I play poorly I'll be very disappointed with myself, if I play well I'm going to be happy.
"With Rafa not playing I need to get to the semis for that to make a difference to me and there are still some great players in the draw. I still have some tough matches to come.
"I know I play Stanislas Wawrinka next, my coach always goes and watches the match before me to get tactics right, but I don't know much further than that."
Federer warned Murray he will not hold any advantage if they meet in the Final.
Murray has won six of their last eight meetings but Federer said: "I don't want to take anything away from him but he played me when I had back problems."
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