The second day of full competition at the Athens Olympics produced 12 gold medal winners.

The U.S. men's Olympic basketball team was not playing for a medal Sunday, but it became a part of Olympic history in its first game. Puerto Rico upset the defending gold medalists, 92-73. The U.S. team had been undefeated in 25 previous Olympic games when using National Basketball Association players.

Udomporn Polsak became the first woman from Thailand to capture gold, winning the 53-kilogram weightlifting event with a total lift of 222.5 kilos. Raema Lisa Rumbewas of Indonesia was second (210 kg) while Mabel Mosquera of Colombia placed third (197.5 kg). Turkish weightlifter Halil Mutlu won gold for the third straight Olympic games by lifting a total of 295 kilograms in the men's 56-kilogram weight class.

With a late burst of power, cyclist Sara Carrigan of Australia sped away from German Judith Arndt over the final 10 kilometers to win the Olympic road race title. Carrigan completed the race in three hours, 24 minutes, 24 seconds.

Defending champion Timea Nagy of Hungary held on to the fencing gold medal in the Olympic women's epee competition. She defeated Laura Flessel-Colovic of France, 15-12, in the final. Another Frenchwoman, Maureen Nisima, took bronze with a (15-12) win over Hungarian Ildiko Mincza.

Matato Uchishiba took Japan's third gold medal with a victory in the men's 66-kilogram judo event, beating Jozef Krnac of Slovakia. Xian Dongmei of China stopped Yuki Yokosawa of Japan to win the women's 52-kilogram category.

In the pool, South Africa captured the coveted men's four by 100-meter freestyle relay gold in a world record time of one minute, 13.7 seconds. The Netherlands took silver while the once dominant United States settled for a surprising bronze.

Japanese swimmer Kosuke Kitajima splashed to Olympic gold in the men's 100-meter breaststroke with a time of one minute, zero-point-zero-eight seconds. American Brendan Hansen followed (1:00.25) while Hugues Duboscq of France took the bronze (1:00.88).

Among the women, Australian Petria Thomas claimed her second gold medal of the Athens Olympics by claiming the women's 100-meter butterfly crown in 57.72 seconds. Otylia Jedrzejczak of Poland was second (57.84) while the bronze went to world record-holder Inge de Bruijn of the Netherlands (57.99).

Laure Manaudou earned just the second Olympic gold medal ever for France with a triumph in the women's 400-meter freestyle with a time of 4:05.34. Otylia Jedrzejczak of Poland placed second (4:05.84) while American Kaitlin Sandeno was third (4:06.19).

In shooting finals, Olena Kostevych of Ukraine won the gold medal in women's 10-meter air pistol after beating Jasna Sekaric of Serbia-Montenegro in a shoot-off to take the final. Maria Grozdeva of Bulgaria won bronze. Russian Alexei Alipov shot all 25 targets in the final to finish with an overall score of 149, tying the Olympic record in men's trap. Italyian Giovanni Pellielo won the silver, three points behind. Adam Vella of Australia took the bronze with a 145.

The U.S. women's softball team, seeking its third straight gold medal in the eight-team tournament, has won its first two games by a combined 17-0 score, with both ending on the five-inning 'mercy' rule. The latest Sunday was a 10-0 win over Australia. The Olympic tennis tournament also got underway.

China tops the medal table after two days with five gold medals and seven overall. Australia has eight overall, but just four golds. Japan also has four golds, and is currently third with five overall. Italy, Ukraine and the United States follow in the early standings.