Australia's Alice Ingley defeated Lucilla Boari from Italy this afternoon in the Round of 64. With Ingley being ranked 353rd in the world and Boari 24th, it was the afternoon's biggest upset.
Other than that, however, the afternoon session provided little in the way of drama, with Ingley losing to Brazil's own Marcelle Ane dos Santos - ranked 64th - in the Round of 32 (though Dos Santos' elation after defeating Saori Nagamine of Japan in the first round and the subsequent tears as the home crowd got to its feet was indeed heartwarming).
In the morning session, though, this was not the case.
The third match of the day pitted American and medal contender Mackenzie Brown, who is currently ranked fourth in the world, against Italy's Claudia Mandia, ranked 74th. A 4-4 score after the fourth set forced a fifth, which Brown took 26-22, allowing her to move on to the next round and keeping her dream of taking the gold medal away from South Korea alive.
But it wouldn't be for long.
In the Round of 32, Myanmar's San Yu Htwe (ranked 191st) upset Brown 6-3, moving on to the Round of 16 later this week.
On the men's side, Wei Chun-heng of Chinese Taipei met Witthaya Thamwong (Thailand) in the Round of 32, after winning his first-round match. Following the fifth set, the two men were tied at 5; the match then went to a shootout, and though both shot a 10, Chun-heng's shot was closer to the center of the target, and he advanced.
Then there was Duzelbayev Sultan from Khazakstan, ranked 125th in the world. He was up against Gu Xuesgon of China, ranked 39th, in the Round of 64. They had finished at 48 and 17 respectively in the ranking round, but it was Sultan who came away with the win this time, defeating Xuesong 6-4.
But the biggest upset of the day - and what will probably be considered the biggest upset in archery during these Olympic Games - came at the end of the morning session, in the Round of 32. Indonesia's Riau Ega Agatha, with a score of 6-2, beat Kim Woo-jin of South Korea, the current No. 1 in the world, as well as the world and Olympic record holder, having scored a 700 in the ranking round - something no archer has accomplished before.
For a full list of results, click here.
Archery coverage resumes tomorrow morning at 8AM ET with the second day of the women and men's individual rounds of 64 and 32