Frenchman Jeremy Chardy has admitted that he is full of confidence following his performance at the Australian Open so far.
"I know I can beat everybody. So when I feel confident, I believe in me," he said. "Against Del Potro, I played a very good match. So it was good for my head.
"After my first win, I feel more relaxed, more confident. Now I'm in a quarter-final. It's just like a dream."
Chardy won his most recent match against Murray at the Western & Southern Open back in August 2012.