ANDY MURRAY believes his quickfire victories here will give him an extra edge later in the tournament after cruising to a straight-sets win over Robin Haase.

The Scot beat the World No.78 from the Netherlands 6-1, 6-1, 6-4 in an hour and 27 minutes on Court No.1 – a venue where he has never lost in 10 years – meaning he has taken less than four hours to reach round three after another straight-sets victory over Mikhail Kukushkin on Tuesday.

Italy's Andreas Seppi awaits in the third round and Murray was relieved to save energy, with the likes of Jo-Wilfried Tsonga and Roger Federer potentially to come.

And Murray said he was delighted to progress in such ruthless fashion against an opponent who has presented him with difficulties in recent years.

At the US Open last year, the Scot had cramped up badly despite coming through their first-round match in four sets.

“I wanted to make sure,” said Murray. “I've obviously had some tough matches with him [Haase] in the past. I know when he's on, he can make it extremely difficult. He can be pretty flashy and play two or three great games in a row. I wanted to make sure that I didn't give him that opportunity.

“In Grand Slams you have to try to conserve energy when you can really because the two weeks can be quite draining physically and mentally,” he added. “It can pay off towards the end of the tournament."

While the performance was a clear upgrade on his first-round win against Kukushkin, the Scot said it was difficult to compare his level of play with how he had felt last year.

“I mean, last year I played some good tennis in the first week,” he said. “But, yeah, the first couple of sets were excellent. Then even third set, some of the points were very good. I moved well and hit the ball a lot cleaner from the back of the court.

“The courts are different in that Court 1 is more open,” he added, “But I've always played quite well on Court 1. I like the court and I’ve played Davis Cup matches there. I've always liked that court."

The Scot now faces Seppi, the 31-year-old – ranked No.27 in the world – overcoming Borna Coric in five sets, but only after the talented Croatian youngster required treatment for a hamstring problem.

“Seppi has had such good results this year,” said Murray. “He made the final a couple of weeks ago in Halle and plays well on the grass. He won against Roger at the Australian Open this year. So he's capable of playing some top tennis.”

He was joined in the second round by James Ward, the Londoner with whom he practises regularly and spends plenty of time at his home in Miami.

Ward now faces Vasek Pospisil of Canada in the third round on Saturday, and he can rely on further assistance from his pal.

“With James, I've spent a lot of time with him over the last 12, 18 months really,” said Murray. “We've done a few training blocks together. He stayed with me in Miami a few times.

"I watch a lot of his matches online when he's playing challengers and stuff. I kind of say well done, or let him know what I thought about the match, anything like that. See if I can help in any way.”

Aljaz Bedene was unable to join them as he lost to Viktor Troicki.