After losing the first set against an opponent playing his first tour-level match on grass, Roger Federer got back to normal Tuesday at Wimbledon.
Federer shrugged off an early deficit to beat Lloyd Harris of South Africa 3-6, 6-1, 6-2, 6-2 on Centre Court at the All England Club in London, beginning his quest for a record-extending ninth Wimbledon title.
"I think once I got going, just legs weren't moving and things were not happening," Federer said. "You know, it is always ... unusual first, let's say, two to three matches maybe, here at Wimbledon, they're always so different to any other court in the world, the way the ball bounces, the kick goes or doesn't go.
"I just felt like it was slow. I couldn't really have any impact. He was doing a good job of returning me. I don't think I had an ace in the first two sets maybe. I had two in the first three sets. It wasn't like I was serving poorly, you know. I guess I wasn't hitting my spots, and he was reading my serve, or he was just doing a good job."
Harris was making his debut at the grass-court Grand Slam and rode his powerful serve to a one-set lead. Federer dominated after that, breaking his opponent twice in each of the next three sets and serving out the match with an ace.
"I think with my experience I stayed calm," Federer said. "I know I have other things in the bag that I can come up with, other tricks. I just took a bit of time."
Playing his first match since winning his 12th French Open title, Rafael Nadal had little trouble in making the switch from clay to grass.
Nadal began his search for a third Wimbledon title by beating Japanese qualifier Yuichi Sugita 6-3, 6-1, 6-3 on No. 1 Court to reach the second round.
Nadal was broken in the opening game but dominated after that, breaking his opponent six times and serving out the match when Sugita sent a return long. Nadal will next face Nick Kyrgios.
Kyrgios advanced to the second round despite winning only five points in the fourth set. The unseeded Australian beat Jordan Thompson 7-6 (4), 3-6, 7-6 (10), 0-6, 6-1.
Kyrgios took a medical timeout after the second set and a trainer came on court to examine his left side. He then won the third set in a tiebreaker -- a set that took 1 hour, 16 minutes to complete.
The fourth set, however, lasted only 18 minutes as Thompson won 24 points while Kyrgios took only five.
"The medical timeout was to loosen up my hamstring a little bit. It was a physical match.'' Kyrgios said. "Especially on the grass, it was a little bit slower this year. There were a lot more rallies.''
The match was not conventional. Both Kyrgios and Thompson complained to the chair umpire during the match. Kyrgios received a code violation.
He also attempted hits between his legs on numerous occasions, with no success.
"There were a lot of ups and downs. Five sets of tennis against Nick -- anything can happen out there,'' said Thompson, who has known Kyrgios since they were 8 or 9 and is a frequent opponent in video games. "It's tough. But everybody that plays him knows it's going to be tough. He's going to be in and out, and you've just got to keep your own concentration."
Sam Querrey of the United States took the last nine games and upset No. 5 seed Dominic Thiem 6-7 (4), 7-6 (1), 6-3, 6-0 to make the French Open runner-up the third top-10 man already gone in Wimbledon's first round.
The 65th-ranked Querrey was one point from falling into a two-set deficit while serving down 5-4 in the second. But he held on there and then took a lead by getting his initial break of the match in the third set.
"Especially against a big server like myself, it's a little draining once you lose serve. Kind of took the wind out of his sails a little bit,'' said Querrey, who ended the match with his 22nd ace.
Thiem has lost to Nadal in the final at Roland Garros each of the past two years. He is a lot less comfortable on grass: This was the Austrian's third first-round exit in six appearances at Wimbledon.
"I was mentally prepared for this kind of game,'' said Thiem, who has had much more success on the slower clay surface. "Just broke down a little bit after he converted his first break chance, and that was it basically.''
"For that many guys to lose early ... yeah, it's just too many,'' said Federer. "But I guess it happens.''
"This is probably,'' Querrey said, "the Slam that I'm most comfortable at."
Querrey's countryman John Isner finished off his opening match at Wimbledon in straight sets, beating Casper Ruud of Norway 6-3, 6-4, 7-6 (9) in his first grass-court match of the season. Isner hit 29 aces and saved both break points he faced.
Isner was returning from a stress fracture in his left foot that sidelined him since late March.
"It was touch-and-go for a little bit whether I was going to play this tournament. So I was just happy to be back out there,'' said Isner, the ninth-seeded American who lost in the first round of the Australian Open in January, then sat out the French Open in May. "If I didn't win, as long as I walked off the court healthy, I would have been happy with that.''
Tiafoe reached the third round at Wimbledon last year and achieved his best Grand Slam result by making the quarterfinals at this year's Australian Open.
Information from The Associated Press was used in this report.