Andy Murray admits that he is pleased with his recent clay court form, but believes he still has work to do if he is to become known as a specialist on the surface.

The world number three eased his way into the fourth round of the French Open thanks to a straight sets victory over Australian Nick Kyrgios on Saturday.

It was Murray’s 13th consecutive triumph on the surface as he bids to make it to his first ever French Open final at Roland Garros.

The 28-year-old has dropped just one set in his opening three rounds, but he admits that he is still some way short of matching the performance levels of clay court specialists like Rafael Nadal.

He said: “I need to win a few more matches before I can be a clay specialist. There is one guy here who has won the tournament nine times and I have never even been to the final.”

The Scot admitted that he is still not fully comfortable on clay and believes that he will have to raise his game further if he is to progress to the latter stages of the French Open.

He continued: “So far it has been my best tennis on clay, but it will have to get even better if I am going to go further in this tournament. It is never easy for me. Clay is a surface I have never felt that comfortable on.”

Murray will take on home favourite Jeremy Chardy in round four on Monday and the two-time Major winner is on offer at 1.07 to dispatch of the world number 33, who himself is available at 7.00 to spring an upset.