A nine-year-old Argentine junior motorbike rider has died after suffering serious injuries in a crash during a practice session at a weekend competition in Sao Paulo, event organizers said.

Thirty years to the day since his death following a crash that sent shockwaves around the world, Brazilians will pay homage Wednesday to Formula One superstar Ayrton Senna -- a beloved symbol of national pride comparable only to compatriot Pele.

Chants of "Guanyu, Guanyu, Guanyu," drowned out all other sound at the Shanghai International Circuit on Sunday as Zhou Guanyu, China's first and only Formula One driver, stepped onto the starting grid ahead of his first Chinese Grand Prix.

Spain's Jorge Martin won a thrilling Thailand MotoGP race Sunday to close the gap on Francesco Bagnaia in the world championship race.