Defending champion Novak Djokovic made short work of Finland’s Jarkko Nieminen on a day when the temperature hit 41.2C on Centre Court at Wimbledon.
The top seed won 6-4 6-2 6-3 to set up a third-round match with Australian 27th seed Bernard Tomic.
French Open champion Stan Wawrinka easily went past Victor Estrella Burgos 6-4 6-4 7-5.
Seventh seed Milos Raonic, US Open Champion Marin Cilic and 11th seed Grigor Dimitrov also progressed.
Canadian Raonic recorded the third-fastest serve in Wimbledon history as he beat Tommy Haas to set up a third-round match against Nick Kyrgios, who defeated Juan Monaco of Argentina 7-6 (7-5) 6-3 6-4.
It is a year to the day that Australian Kyrgios, 20, caused a major upset by defeating Rafael Nadal in the fourth round at Wimbledon.
Cilic came through a five-set thriller against Ricardas Berankis, while Dimitrov overcame America’s Steve Johnson.
Djokovic’s tribute to Nieminen
Djokovic, who took just one hour and 31 minutes to win his match, told BBC Sport: “On this warm day it’s good to spend a little bit less time out there.
“I’m glad with the way I’m playing and I’m getting into form. As the tournament progresses, hopefully I’ll be able to elevate the level of my performances.”
The match was a farewell to Wimbledon for Nieminen, who is retiring at the end of the season at the age of 33.
“I congratulated him for a terrific career,” said Djokovic.
“He is a very nice guy, one of the nicest and a fighter on the court. It was a pleasure to be the last one to play him at Wimbledon.”
Rocket Raonic
Raonic made quite a bang on his way to a 6-0 6-2 6-7 (5-7) 7-6 (7-4) win over Haas.
The 24-year-old Canadian sent down a 145mph serve against 37-year-old Haas on Court One, but it failed to eclipse Taylor Dent’s 148mph offering from 2010 and fellow American Andy Roddick’s 146mph from 2004.
Raonic, a semi-finalist in 2014, had three match points at 6-5 in the final set on the Haas serve, but the German battled back, only to lose it on the tie-break.
Wily Wawrinka
Wawrinka quietly went about making straightforward progress against Estrella Burgos, the world number 48 from the Dominican Republic.
Swiss world number four Wawrinka, 30, who beat Djokovic in the final at Roland Garros, was barely knocked out of his stride against Burgos as he pursues a third Grand Slam title.
“He’s a tough player. I didn’t know exactly what to expect but I’m happy to get through in three sets,” said Wawrinka, who will now face Fernando Verdasco.
“Verdasco will be a tough player, a lefty with an amazing forehand and loves to play on the grass here.”
Cilic clings on
Ninth seed Cilic was made to work hard by Lithuania’s world number 90 Berankis, but progressed to face the USA’s John Isner.
Croat Cilic, 26, came through 6-3 4-6 7-6 (8-6) 4-6 7-5 in the heat on Centre Court, but Berankis, who fought valiantly throughout, gave away the match with a double fault.
“It was very thrilling. The match was high quality from both ends,” said Cilic, who saved two break points at 2-2 in the decisive set.
“He was playing extremely well, hitting the ball well and causing me a lot of trouble. I had a little bit of a drama in the fifth set as I had to save some break points.
“It’s pretty hot and you have to energise and hydrate yourself a lot.”
Dimitrov delight
Last year’s semi-finalist Dimitrov reached the third round with a 7-6 (10-8) 6-2 7-6 (7-2) victory over American Johnson and the 11th seed has not lost a set in the tournament.
The 24-year-old Bulgarian beat British number one Andy Murray in their 2014 quarter-final before losing to eventual champion Djokovic.
He faces 21st seed Richard Gasquet, who beat fellow Frenchman Kenny de Schepper 6-0 6-3 6-3, in round three.
Dimitrov said: “I loved it out there. It was a great day to play tennis.
“I knew what to expect from Johnson. We have played each other a couple of times and also practised together, so nothing was new.
“I played Richard Gasquet in an exhibition match a few days ago. He is a great grass-court player.
“I know what to expect from him. It won’t be a walk in the park but I like my chances.”
Tomic sleepless in SW19
Australia’s Tomic was one to suffer in the heat, despite seeing off Pierre-Hugues Herbert in three sets.
“I was very dizzy out there,” said the 22-year-old resident of Australia’s Gold Coast.
“I didn’t sleep well yesterday and the day before. I’m probably getting three or four hours of sleep. I was fatigued and starting to get dizzy out there with the heat hitting me.”
The 27th seed was also a bit confused over why the women can call for a heat break after two sets when the temperature rises to a certain point, but the men must play on.
“I was actually talking about that in the locker room,” he said. “It’s a bit interesting how the women have a different rule applied to them with the heat.
“I think ours is slightly different. I think we are allowed to play in more heat. Is it fair or not? Who am I to say? I don’t know. It’s a tough one.”
Ball boy collapses
A ball boy is taken away on a stretcher on court 17
The heat at Wimbledon is not only causing problems for the players.
A ball boy collapsed and was taken off for medical treatment during the match between Matthew Ebden and John Isner on court 17.
The cause of his collapse, which happened shortly before 14:00 BST, has not been confirmed, but Wimbledon tweeted: “The ball boy from court 17 has been treated and is feeling much better. We wish him a speedy recovery.”
Naughty Nick
Kyrgios was not punished for shouting “dirty scum” during his first-round win over Diego Schwartzman, but the 20-year-old’s demeanour was again in focus after beating Monaco.
After making an unforced error at 6-5 in the opening set, the Australian uttered a string of expletives, which a line judge reported to the umpire.
A heated exchange followed before Kyrgios was heard asking the umpire: “Is that a threat?” He added: “Does it feel good to be up there in that chair? Does it make you feel strong?”
Kyrgios later explained: “I was just asking the umpire what the line judge said. I was just curious. I wasn’t causing any drama there.”
He added: “I just thought he thought he was top dog in the chair really.
“He was telling me not to speak to him, all that stuff. It doesn’t really matter, you know.”
‘Everybody out’
The grounds were evacuated after the close of play following a fire alarm.
As the alert interrupted five-time winner Serena Williams’s post-match interviews, she quipped: “Does that mean I’m done with press?”.
