China and U.S. in battle for the top of medals.

For every gold medal that Michael Phelps and the U.S. win in the pool, China is doing the same in the weights and other disciplines. Thus, metal to metal, the two superpowers began to wage a battle for supremacy sports in the Olympic Games.

United States won three of four events in dispute on Tuesday in the bucket, plus a gold in shooting, and was strengthened in the second place with seven medals of that color. China gave no truce and its great wall erected metal into gold weights, diving, fencing and artistic gymnastics that remained on top with 13.

The American delegation takes advantage in total with 22 (7 gold, 7 silver, 8 bronze), followed closely by the hosts with 20 (13-3-4).

Germany was the other king of the day and a sablazo were perched among the leaders, with gold in the single kayak slalom, the 81-kilogram division judo male and swept in on horseback by leaps and individual teams.

Mexico did not win any gold but held as the bronze medal that got the clavadistas Paola Espino and Tatiana Ortiz on the 10-metre platform synchronized, the first podium for the athletes from that country.

That competition was nailed precisely one of the triumphs of the Chinese works of Wang Xin and Chen Ruolin. The Australian Briony Cole and Melissa Wu won the silver.

But despite the celebrations of other countries in the water, Phelps and his companions continued as lords and masters.

What Phelps already ceased to be fair to his rivals, who simply Plunge to fight for second place. The American won her third gold of the games with as many world records, this time in the 200 meter free with time of 1 minute, 42.96 seconds.

The dolphin Baltimore goes by two other gold on Wednesday in the 200 butterfly and 4x200 free. To achieve an almost certain bet, would be more than halfway to eclipse the record of seven in one game of his compatriot Mark Spitz.

Phelps can make history with just one more, which would increase its total harvest to 10. Luminaires as Carl Lewis, Paavo Nurmi, Larysa Latynina and Spitz shared with the youngest 23-year-old mark of nine.

Aaron Pierson won the men's 100 back, with another world record, and Natalie Coughlin won the women's 100 back to round out the golden three prisoners in U.S. swimming. The other was in dispute as Australian Leisel Jones, who pocketed the 100 meters with a chest Olympic record.

But while U.S. splashes of happiness in the water, the Chinese showed their muscle in the weights.

Liao Hui won in the men's 69 kg category and added the fifth gold for China in that discipline, where the local swept all concluding disputed so far. The only escape was left behind in the 63 kilos of women, who won the North Korean Pak Hyon Suk, although no rival Chinese just because a country can join competitors in 10 of the 15 divisions.

The Fencing Zhong Man (sable) and men's artistic gymnastics team also heard the Chinese anthem at the podium.

Russia (2), Slovakia, Japan and South Korea won the other gold medals.
The Brazilian Tiago Camilo, the big favorite in their division, had to be content with the bronze in the 81 kg judo.

In tennis, Roger Federer, Rafael Nadal, Novak Djokovic, David Nalbandian and Fernando Gonzalez advanced on singles, which was without its champion Chilean Nicolas Massu to be eliminated in second round, while Argentina, the United States and Spain won their respective clashes in the men's basketball.