Andy Murray beats Yen-Hsun Lu at Wimbledon 2013

British number one Andy Murray made his way safely through to the third round on a remarkable day of upsets and injuries at Wimbledon.

Murray did not put a foot wrong as he saw off Taiwan's Yen-Hsun Lu 6-3 6-3 7-5 on Court One, and the Scot will play Spanish 32nd seed Tommy Robredo in the last 32.

The straightforward nature of his match was in marked contrast to events across the rest of the All England Club, with seven-time champion Roger Federer's defeat capping an amazing few hours.

Federer, who lost in four sets to Sergiy Stakhovsky, and Jo-Wilfried Tsonga, among seven players to succumb to injuries, were both removed from Murray's possible route to the final.

Rafael Nadal's conqueror Steve Darcis and women's second seed Victoria Azarenka also pulled out, while 2004 champion Maria Sharapova suffered a shock second-round defeat.

Azarenka had taken a nasty tumble on Court One in the opening round and complained about the surface, but Murray had no such problems on the second show court.

"It's tough to talk about the conditions," Murray told BBC Sport.

"I felt comfortable but neither of us slipped. Sometimes you just get unlucky on grass. They can be slick early in the tournament."

Lu gave Murray enough to think about in the early stages, earning three break points in game five with some deep and aggressive hitting from the baseline.

The world number 75 had inflicted a painful defeat on Murray at the 2008 Beijing Olympics but, five years on and ranked second in the world, the Briton was a very different proposition.

He responded when it was required, seeing off the danger each time with a good serve, and after that lengthy hold he moved 4-2 ahead moments later with a forehand return.

Murray wrapped up the first set in 33 minutes with two successive aces, and broke again at the start of the second as the pressure began to tell on Lu's serve.

Another break secured a two-set lead, and Lu did well to hang on to his serve at 3-2 in the third as Murray failed to convert three chances.

But with his own service games free of any threat, the second seed was able to focus his energy on getting the decisive breakthrough.

A first match point went begging at 5-4, and a second two games later before Murray sealed victory when Lu thumped a backhand long after two hours and one minute.

"I thought I kept my concentration well and did well on my serve," Murray added. "Each game I was putting pressure on his serve, but he played ultra-aggressive and it was very tough.

"You're trying to get through the matches - you can't guarantee that any match will be easy. You have to do whatever happens to win as quickly as possible."