Andy Murray was won over by the manner of Rory McIlroy's major breakthrough as he searches for the mental fortitude that will help him to win a first tennis grand slam.

The world number four began his sixth Wimbledon campaign on Monday with a tougher-than-expected 4-6 6-3 6-0 6-0 victory over Spain's Daniel Gimeno-Traver under the Centre Court roof.

Murray has vowed to work hard to improve his attitude on court, not allowing frustration to overwhelm him as seeks the extra edge that will turn grand slam final appearances into titles.

McIlroy could certainly have sympathised after blowing a big lead at golf's Masters earlier this year but the Northern Irishman used the experience as a learning curve and blitzed the field to win his first major at the US Open on Sunday.

Murray was hugely impressed by McIlroy's achievement but does not see their situations as entirely comparable.

He said: "The way he dealt with everything was fantastic. The way he responded from the lead that he had earlier in the year was excellent. He's going to probably go on to be one of the best golfers that we've seen, I think.

"It's just different. They're very different sports in many ways, tennis and golf, because you're always sort of in control I think in golf.

"In tennis, like (against Gimeno-Traver), the first set and a half I wasn't in control of what was going on out there. So they're very different. But the way that he came back from what happened, of having a chance of winning his first major, was great."

Despite the pressure he is under at SW19, Murray enjoys the comfort of being able to stay at home, although that does have its downsides.

The 24-year-old's rest day last Thursday got off to an imperfect start when he was required to undergo a doping test at 7am, the fourth time he had been called on by the drug testers in as many weeks.

Murray said: "You have to give one hour every day where they can come. I put it at 7am because I know I'm going to be in bed.

"It's just a bit annoying because it was my day off and I was looking for a lie-in."

Murray today plays Germany's Tobias Kamke.