This article was written by Laura Oberle based on reporting from The Associated Press.
Maybe there's no such thing as a home-field advantage at the Olympic Games, because Britain had a tough Monday.
After 10-meter synchronized platform divers Tom Daley and Peter Waterfield botched their fourth dive to move from first place to fourth, the British men's gymnastic team was declared the winner of the silver medal only to have it taken away minutes later.
For this side of the pond, the U.S. claimed four medals in swimming (although none for front-runner Ryan Lochte) and saw early-round victories in women's tennis and volleyball. Tennis' Williams sisters both won their early-round matches, with Venus Williams bidding for a record fourth gold medal. In a rematch from the 2008 Beijing finals, the U.S. women's volleyball team defeated Brazil 3-1.
China and the U.S. are tied in the total number of medals, but China still leads in the number of gold medals with nine. The U.S. has won five gold medals.
China men's teams stay on top in swimming, gymnastics
Winning the Artistic Gymnastics gold Monday, China remains No. 1 in men's gymnastics. The Chinese won their second straight Olympic title and third in four games, finishing in first by far with a score of 275.997 points.
Britain was initially announced as the silver medalist, but after Japan filed an inquiry over the score of its own Kohei Uchimura on the pommel horse, his score was revised, bumping Japan up to silver, while Britain received the bronze.
Britain was disappointed again when the gold-medal hopes of Tom Daley and Peter Waterfield sunk in the men's 10-meter synchronized platform Monday. China's Cao Yuan and Zhang Yanquan totaled 486.78 points in the six-dive final to win the gold, extending China's diving dominance with its second gold medal on the boards at the London Olympics.
Nick McCrory and David Boudia of the U.S. took the bronze with 463.47. The U.S. is 2-for-2 in synchronized diving events after Abby Johnston and Kelci Bryant earned a silver in the 3-meter synchronized springboard Sunday, ending a 12-year medal drought.
U.S. spotlight on swimming
Missy Franklin and Matt Grevers took gold in their respective 100-meter backstroke finals.
Nick Thoman took silver in the men's 100-meter backstroke with a time of 52.92. In the women's 100-meter breaststroke, Rebecca Soni of the U.S. touched second in 1:05.55.
After opening the games with a dominant win in the 400-meter individual medley, Ryan Lochte finished fourth in the men's 200-meter freestyle Monday. France's Yannick Agnel took gold. On Sunday, Lochte gave up a seemingly comfortable lead to Agnel in the last leg of the 4x100 meter freestyle relay to give France the gold.
Michael Phelps has yet to win a gold medal in London.
Williams sisters, U.S. women's volleyball win early rounds
The Williams sisters were in fine form Monday. Venus Williams began her bid for a record fourth gold medal in Olympic tennis Monday by beating Sara Errani of Italy, 6-3, 6-1.
Twenty minutes after Venus Williams won on Court 2, her younger sister Serena closed out a second-round victory on Court 1, beating Urszula Radwanska of Poland, 6-2, 6-3.
In the 2008 Beijing Games final, Brazil defeated the U.S. women's volleyball team. Monday provided an early-round rematch, but this time the U.S. came out on top, defeating Brazil 3-1.
At the games
Restrictions on what Olympians can promote at the London Games are upsetting some competitors, who want organizers to change the policy — especially to help athletes without lucrative sponsorship deals.
Sponsorship is everywhere at the Olympics — but official sponsors only. Rule 40, the International Olympic Committee policy barring Olympic athletes from using their names or likenesses for advertising during the games, is in effect from July 18 through Aug. 15, three days after the closing ceremony.
France in 2024?
If the price is right, or if "all the conditions of success are present," French President Francois Hollande is considering a bid for the 2024 Olympics after his country lost the 2012 Games to London.
France has ruled out a bid for the 2020 Olympics after Annecy lost the 2018 Winter Games to Pyeongchang, South Korea. Before losing to London, Paris failed to win the 2008 Games, which were awarded to Beijing.
What to watch
Visit NBC.com for the full schedule of Olympic events Tuesday.
8 a.m. CDT: Men's skeet shooting final
9 a.m.: Women's synchronized 10 meter platform final
9:06 a.m.: Men's whitewater canoe/kayak C-1 final
10 a.m.: Women's judo 63kg finals
10:10 a.m.: Men's 81kg judo finals
10:30 a.m.: Women's gymnastics team final
1:40 p.m.: Men's individual foil fencing final
1:41 p.m.: Women's 200 meter freestyle final
1:49 p.m.: Men's 200 meter butterfly final
2:43 p.m.: Women's 200 meter individual medley final
2:51 p.m.: Men's 4x200 meter freestyle final
4:15 p.m.: Men's basketball preliminary, USA vs. Tunisia
Find complete coverage of the London 2012 Summer Olympics from The Associated Press at summergames.ap.org/columbiamissourian.