U.S. NBA stars routed Argentina 126-97 Monday to remain unbeaten and set up showdowns in Wednesday's Olympic quarterfinals, with the alluring chance of a U.S.-Russia gold medal final on Sunday.

The Americans could meet Russia 40 years after a U.S. squad lost to the Soviet Union in a controversial Olympic final where the last seconds were played three times before the Soviets won, the first U.S. defeat in Olympic history.

Bayern Munich says Germany striker Mario Gomez has undergone surgery on his left ankle and will be out of action for three weeks.

Bayern says the 27-year-old Gomez had the operation on Tuesday.

Arsenal made its third offseason player signing on Tuesday, with Spain attacking midfielder Santi Cazorla joining from Malaga on a long-term contract for an undisclosed fee.

Arsenal has already signed Olivier Giroud from Montpellier for a reported 13 million pounds (€20 million) and Lukas Podolski from FC Cologne for an undisclosed fee.

Felix Sanchez cried like a baby as he led a night of shocks at the Olympics, with Russia's pole vault queen Yelena Isinbayeva dethroned and the men's 400m title pried from American hands.

Sanchez, with his famous Superman tattoo and trainers inscribed with "Abuela" (Spanish for "grandmother"), defied all expectations when he regained his 400m hurdles title, at the age of 34 and after a gap of eight years.

China is more than halfway toward a sweep of the diving gold medals at the London Olympics and suddenly looking vulnerable.

For the first time since diving began, the Chinese didn't lead a round. Ilya Zakharov of Russia topped the standings going into the men's 3-meter springboard semifinals on Tuesday.

The only drama in synchronized swimming is who's going to take the silver.

The Russian national anthem will surely be playing during the medal ceremony. Again.

Olympic great Michael Phelps admits to a different sort of gold run -- his habit of peeing in the pool.

The champion swimmer, who is retiring from competitive swimming after his success in the London Olympics, told the Wall Street Journal that professional swimmers didn't bother clambering out to search for a toilet.

A Japanese track cyclist from the no-go zone around the crippled Fukushima nuclear plant is helping unite a community scattered by last year's quake-tsunami disaster as they cheer him on in the London Olympics.

Refugees gathered in the city of Tsukuba on Friday to watch Kazunari Watanabe in the team sprint and will get behind their native son again on Tuesday when he takes part in the Keirin event.

Carmelo Anthony doesn't want to mess around against Argentina. Not after the close call against Lithuania.

Anthony, LeBron James, Kobe Bryant and the rest of the star-studded U.S. basketball team have now been tested at the London Olympics — and, admittedly, they weren't quite prepared for it.

Usain Bolt stormed to a successful defense of his Olympic 100m crown in the second-fastest time ever recorded as the Jamaican superstar confirmed his status as the greatest sprinter of all time.

Bolt made a hesitant start but left the field for dead from 60 meters to win by two meters (yards) in 9.63sec, slower only than his world record of 9.58sec set in 2009.