WIMBLEDON, England — Roger Federer gave Prince Charles a bow, then gave Fabio Fognini a royal thumping.
With the Prince of Wales visiting Wimbledon for the first time since 1970, Federer was at his best Wednesday and beat Fognini 6-1, 6-3, 6-2.
Federer, a six-time winner at the All England Club, won 37 of 41 points on his first serve and 21 of 23 points at the net against Fognini, an Italian ranked 68th.
Prince Charles and the Duchess of Cornwall sat in the first row of the Royal Box as Federer walked onto Centre Court for the day's first match. He and Fognini stood side by side as they bowed awkwardly toward the royals, and Charles responded with a wave and grin.
"They do brief you beforehand," Federer said. "I guess you don't do anything stupid. You behave. Obviously we were asked to bow, which is obviously no problem to do. We're thrilled for the tennis family that they came to watch Wimbledon today."
Shortly after Federer's victory, rain interrupted play, and the retractable roof on Centre Court was closed for the first time in the tournament. Defending champion Novak Djokovic won under the lights, beating American Ryan Harrison 6-4, 6-4, 6-4 in the final match of the day, which finished at 9:52 p.m.
"We went the distance," Djokovic said. "I'm honored to be in a position to play on the most recognized Centre Court worldwide in our sport. Every time I step on Centre Court, you can feel the different energy from any other tournament."
Former No. 1 Caroline Wozniacki lost under the roof to Tamira Paszek, who saved two match points in the second set and won 5-7, 7-6 (4), 6-4.
Other Grand Slam champions advancing included Kim Clijsters and Andy Roddick, while 2011 U.S. Open champion Samantha Stosur and 2011 French Open champion Li Na lost. More than a dozen matches on outside courts were postponed until Thursday.
Top-ranked Maria Sharapova led 7-6 (3), 3-1 when her second-round match against Tsvetana Pironkova was suspended because of darkness. Sharapova saved five set points in the first set.
Sloane Stephens, a 19-year-old American playing at Wimbledon for the first time, saved five set points in the first set and beat No. 23 Petra Cetkovska 7-6 (6), 4-6, 6-3. In the final set, Stephens trailed love-30 in four consecutive service games, yet won them all.
"I'm 19 and I do still have some lapses," she said. "They're less now than I used to have in the past. I really don't get as upset when I lose points now. I'm not that emotional anymore."
Sara Errani needed only seven seconds to complete a rain-interrupted win, and she didn't even have to hit a ball.
Three-time Wimbledon runner-up Roddick needed three hours over two days to complete a first-round win over British wild card Jamie Baker, 7-6 (1), 6-4, 7-5.