Richard Carapaz and the rest of Ecuador are "over the moon" after his victory in the men's cycling road race on Saturday.
Carapaz – who finished third in the general classification of the Tour de France earlier this month – crossed the finish line on the Fuji speedway well over a minute ahead of his nearest rivals to clinch Ecuador's second Olympic gold medal.
Meanwhile in the tennis, Andy Murray, who clinched gold in the singles at the 2012 and 2016 Games, started strongly with his doubles partner Joe Salisbury, as Team GB overcame French favourites Nicolas Mahut and Pierre-Hugues Herbert.
There was a shock for 2008 gold medallist Phil Dalhausser, as he and fellow American Nick Lucena fell foul of Dutch duo Robert Meeuwsen and Alexander Brouwer, while Naohisa Takato won Japan's first gold of the Games.
CARAPAZ CLAIMS RARE ECUADOR TRIUMPH
Carapaz came close in Le Tour, but ultimately could not match the power of Tadej Pogacar, who defended his title in cycling's prime road race.
Yet on the slopes of Mount Fuji, the South American came up with the goods to deliver a long-awaited success for Ecuador.
"My country is over the moon right now. It's the second Olympic medal in the history of my country," he told a news conference after his success, with Tour champion Pogacar claiming bronze behind Belgium's Wout Van Aert.
"The last medal that we won was 25 years ago, so it's a very special moment. It's the first medal in cycling, and cycling is a big sport in my country."
Carapaz's triumph came as good news for Geraint Thomas, who crashed out of the race after colliding with his British team-mate Tao Geoghegan Hart.
"Couldn't be happier for Richard Carapaz," tweeted Thomas – the Ecuadorian's fellow INEOS Grenadiers rider. "To finish on the podium at the Tour and win gold a week later is just incredible. Enjoy it mate. King of Ecuador."
MURRAY STARTS STRONG
It has been a long comeback trail for Murray, who was at the top of his game when he won his second Olympic gold medal back in 2016.
He faces a stern test in the singles on Sunday, when he goes up against Canada's Felix Auger Aliassime, and while a defence of that win may be unlikely, he and Salisbury made good progress in the doubles.
Murray was a silver medallist in the mixed doubles at the London Games, and along with Salisbury had too much for second seeds Mahut and Herbert, with the pair needing just 75 minutes to win 6-3 6-2.
"I think we have the potential to be a really good team," said Murray. "We were well deserved winners today – we created lots of chances, but not every doubles match is like that.
"If we keep the same sort of attitude and everything, prepare diligently, I think we've got a chance of doing well."
Murray's younger brother Jamie also enjoyed a fine start, as he and Neal Skupski came from behind to beat Argentina's Andres Molteni and Horacio Zeballos in a final-set tie-break.
TAKATO GETS JAPAN UP AND RUNNING
Naohisa Takato won Japan's first gold medal of the Tokyo Games, as he triumphed in the men's under-60kg judo final against Yang Yung-wei of Taiwan.
Takato, a three-time world champion and a bronze medallist in Rio, claimed a fitting victory for Japan in a sport that originated in the country, with the event taking place at the famous Nippon Budokan venue.
He had to beat Yeldos Smetov of Kazakhstan in a gruelling semi-final. Smetov shared the bronze medal with France’s Luka Mkheidze.
A shock earlier in the day saw Robert Mshvidobadze drop out in the last 16.
DALHAUSSER'S STRUGGLES CONTINUE, NO JOY FOR SETO
It has been a difficult start to the Games for Beijing beach volleyball champion Dalhausser, who had to quarantine after he was deemed a contact of Taylor Crabb. He was forced to withdraw due to a positive COVID-19 test, which has dented the United States' hopes.
Dalhausser could only train with Lucena on two occasions prior to Saturday's meeting with Meeuwsen and Brouwer and the lack of sharpness told as the Dutch prevailed 21-17 21-18 at the Shiokaze Park arena.
There was also no joy for home favourite Daiya Seto. The Japanese swimmer, who won a bronze medal in 2016, had been tipped to shine in the men's 400m individual medley, yet failed to qualify for the final as he finished ninth in the heat.
"In Rio I went out too fast [in the prelim] and didn't recover for the final. In the last 100 [today] I didn't let it all out. It was a misjudgement. The pressure wasn't too much," Seto said afterwards.
"I have the 200m butterfly and 200IM. I'll just forget what happened and focus on my events."