Rio Olympics 2016 started on August 5. On Sunday, August 7, the sports events are, women's gymnastics qualifications and swimming events.

Team U.S. gymnasts are Simone Biles, Gabby Douglas and Aly Raisman, Team U.S. swimmers are Katie Ledecky and Michael Phelps.

Currently, the U.S. is the leading country on the second day of the Rio Olympics as the country bagged three golds, five silvers, and four bronze medals-a total of 12 medals. Then followed by China, which bagged three golds, silvers, and three bronzes. In the third place, is Australia that bagged three golds and three silver medals.

Events to watch Women's Gymnastics Qualification round (during TV broadcast at 7 p.m. ET) , Women's Swimming: 400m Freestyle Final, at 10:01 p.m. ET and Men's Swimming - 4x100m Freestyle Final at 10:54 p.m. . You can watch the live stream on NBCOlympics.com.

Aside from watching live steam, CBS Sports provided a live blog. Here, you can follow the live update.

On August 8, the official Twitter account of Olympics announced that U.S. swimmer Katie Ledecky won her first gold medal of the Rio Olympics in Women's 400m Freestyle WR, on Sunday, August 7. As a matter of fact, she broke her own record in the 400m freestyle by two seconds, according to Business Insider.

The 21-year-old swimmer Adam Peaty won gold in 100m breaststroke in 57.13 seconds. Then, Jazz Carlin, who competed in 400m freestyle won silver medal, according to BBC.

The U.S. swimmer Michael Phelps was set to compete in the 100- and 200m butterfly. The 31-year-old swimmer won his 19th Olympic Gold. His son Boomer attended Olympics for the first time.

Even though Phelps has been competing in swimming for years, he can still feel the pressure of the competition.

"On the block I thought my heart was going to explode, I was so hyped, so excited," Phelps said.

Watch the swimming competition on live stream here.