ANDY MURRAY swears blind that tennis players are treated more harshly than footballers when it comes to bad language.

After he booked his place in a 17th consecutive Grand Slam quarter-final with a 6-4, 3-6, 6-3, 6-2 win against Jeremy Chardy of France, the Scot said he felt he had improved his on-court outbursts dramatically in recent times. He was speaking after a tennis coach took him to task on Twitter for his language in the previous round.

"I would rather I didn't do it, but unfortunately, it's one of the mistakes I make as a human being, and I try to be better," said the Scot.

"But with tennis it gets picked up on a lot. Often when we go for our towels, the microphone is right there and you forget where you are sometimes.

"Whereas in some of the other sports, like football for example, I don't think the language they use is that pleasant all the time, but obviously the camera and microphone is not on them all of the time so you don't hear it as much."

Only briefly was there any need for the Scot to get worked up during his defeat of Chardy, the World No.45 on the Suzanne Lenglen court yesterday.

While the Frenchman claimed that Murray was panicking when he was a break to the good in the third set, the Scot simply kept calm and carried on winning.

"I wasn't overly concerned," added the 28-year-old. "Throughout the course of the match I was creating many more opportunities than him. It was for sure the best match I have played in this tournament so far and the crowd created a good atmosphere."

The 28-year-old sits fourth on the all-time open era list for successive appearances at this stage in majors which they have played, behind just Roger Federer (36), Jimmy Connors (27) and Novak Djokovic (24). Should he beat David Ferrer of Spain in the next round, his 15-match winning streak will equal any he has compiled throughout his career.

"In terms of the history of the game, there are not loads of players that have been that consistent at these events," said the Scot.

"So that's something I look at and I'm very, very proud of. I'm glad I have managed to maintain that consistency even when I've had some tough periods over the last couple of years with the injuries and the back."

Should he overcome Ferrer, he would need to achieve something he has yet to accomplish during his career. Despite a 9:6 head-to-head record in all competitions, in three attempts he has never beaten him on clay, a run which includes a four-set defeat at this stage here in 2012.

"I'm sure both of us will have changed and probably improved since that time," said Murray.

"David is a fantastic player on all of the surfaces. But he's had his best results here.

"So it will obviously be a big test for me. On this surface he's for sure of one of the top sort of four or five players in the world.

"I'm going to have to work extremely hard in that match and be very patient and try to dictate the play as much as I can."