Meanwhile it was a quieter day for Team Hong Kong, China, with the SAR's sole rower closing out his campaign.
Overall, China sit top of the medal table with 13 golds, ahead of France and Australia with 11 apiece.
Zheng and Huang seal mixed doubles gold ... and more
China’s Zheng Siwei and Huang Yaqiong smashed their way to a gold medal in the mixed doubles badminton, beating Kim Won-ho and Jeong Na-eun of South Korea in straight sets.
Huang's boyfriend and fellow Chinese shuttler Liu Yuchen proposed to her after the final. She accepted, to the delight of an ecstatic crowd.
Tiebreak heartbreak for Wang and Zhang
China's hopes of clinching a first Olympic tennis gold medal in two decades were dashed as the nation's mixed doubles pair came up short against the Czech Republic in a thrilling final which ended at nearly midnight, Paris time.
Wang Xinyu and Zhang Zhizhen had to make do with a silver. It was still the first tennis medal for the nation since Zheng Jie and Yan Zi struck bronze in the women's doubles in 2008.
Wang, Long take diving gold number four
Wang Zongyuan and Long Daoyi won the men's synchronised 3-metre springboard to claim the nation's fourth gold in diving. Both second-time Olympians, the pair finished on 446.10 points.
Wang, 22, previously won gold in the same event in Tokyo three years ago with Xie Siyi, who is only competing in the individual event as defending champion.
Sun to face Chen in table tennis final
Table tennis powerhouse China secured gold and silver in the women's singles, as top seed Sun Yingsha and Chen Meng made it through in dominant fashion.
On the men's side, Chinese second seed Fan Zhendong crushed local favourite Felix Lebrun 4-0 in a little more than half an hour to claim a place in the final.
China's badminton pairs to clash in final
It will be a guaranteed gold and silver for the national team as two Chinese pairs advanced to the final in the women’s doubles badminton event at La Chapelle Arena.
In the first semi-final, Chen Qingchen and Jia Yifan beat their Malaysian counterparts 2-1. In the other match, Liu Shengshu and Tan Ning won in straight sets, after defeating Nami Matsuyama and Chiharu Shida of Japan 2-0.
Chiu battles to the end in rowing sculls
Hong Kong, China rower Chiu Hin-chun on Friday fought hard for the best rank he could get in the men’s single sculls, despite dropping out of contention for a medal.
Chiu finished second out of six in his group D race to rank 20th overall. He previously competed in the Rio Olympic Games, where he finished 19th in the lightweight double sculls.
Sailor Halliday still in middle of pack
Hong Kong sailor Nicholas Halliday maintained a steady position in the pack after two more races in the men's dinghy event, with six still to come over the next three days.
The 25-year-old is the first SAR Olympian to qualify for the ILCA 7 single-handed event. He ranked 28th out of 43 sailors.
Marchand, McKeown make history in the pool
Home favourite Leon Marchand demonstrated again why many consider him the best swimmer of his generation as he stormed to his fourth individual gold medal in the men's 200m individual medley at La Defense Arena.
Meanwhile Kaylee McKeown cemented her place among the greats of Olympic swimming as she became the first woman to retain both of the backstroke titles with gold in the 200m.
Records tumble on first day of track action
Uganda's Joshua Cheptegei won the men's 10,000 metres gold medal, the first track medal of the athletics programme, in an Olympic record time of 26 minutes, 43.14 seconds.
Earlier, there was an explosive start to the track and field competition at the Stade de France when the United States mixed 4x400m relay broke the world record to qualify in first place for the final.
Alcaraz and Djokovic set up battle of generations
Carlos Alcaraz became the youngest man to reach the Olympic Games men's tennis final when he thrashed Felix Auger-Aliassime.
The Spaniard will face Novak Djokovic who reached his first Olympic final in what should be a dream showdown for gold.
