Olympic table tennis debutant Kim Song-I of DPR Korea denied star paddler Ai Fukuhara's chance of taking a revenge for fellow Japanese Kasumi Ishikawa on Wednesday.
Deng Wei won the women's 63kg weightlifting by breaking two world records while Long Qingquan and Shi Zhiyong also brought home gold.
Ning Zetao, who became the first Asian man ever to win the 100m freestyle at the world championships in Kazan last year, failed to qualify for the men's 100m freestyle final at the 2016 Rio Olympics on Tuesday.
China's Chen Ruolin and Liu Huixia claimed gold in the women's synchronized 10 metre platform diving event at the Rio Games on Tuesday, with Malaysia and Canada respectively taking the silver and bronze medals as the venue's pool turned a bright green hue.
Olympic champion and world number one Serena Williams was bundled out of the Rio de Janeiro tennis tournament in the third round of the singles on Tuesday after a shock 6-4 6-3 defeat to Ukraine's Elina Svitolina.
Michael Phelps seized the 20th Olympic gold medal of a swimming career that keeps on giving with a 200 metres butterfly triumph on Tuesday that avenged his stinging 2012 defeat to South African Chad Le Clos.
Deng Wei of China breaks two world records in the women's 63kg weightlifting to win the gold medal with a total of 262kg.
The Rio 2016 organizing committee is making new flags for China after Chinese citizens watching the ceremony on television complained that the stars were incorrectly positioned.
I thought the Olympic Games, no matter their venue, are meant to be sellout events. On second thought, triggered by Rio's half-empty stands, I think the world has changed.
Top swimmer Sun Yang overcame the first day of gloom with a 200m freestyle title as teammates Xu Jiayu and Fu Yuanhui added glory.