Andy Murray celebrates after winning a point against Austria's Jurgen Melzer on Saturday.

The Briton said his confidence was sky-high as he took another step towards his first Grand Slam title entering the last 16 with au00a0 7-5, 6-0, 6-3 win in an hour and 40 minutes. "It was a good test to see where my game was at, and I'm very happy," he said.