Chardy comes up against an in-form Murray tomorrow but believes that he can play without pressure and spring another surprise in Melbourne.
He told reporters: "When I start to hit my forehand, I start to feel confident.
"When my forehand is there, my head is there, everything is there. It's always easier when you play with nothing to lose. I can go for it, enjoy my tennis, but I will stay focused because I think I have a chance to win."
Murray is one of three players in the men's draw who has yet to drop a set in the tournament ahead of tomorrow's match.