Formula One champion Fernando Alonso began a bid for his first victory in the Monaco Grand Prix by posting the fastest time in Thursday's opening practice, then added another top time in the afternoon.
MotoGP champion Valentino Rossi turned his back on a career in Formula One on Wednesday and pledged his immediate future to racing on two wheels.
Fernando Alonso's decision to leave Renault could be good for the Formula One champions, according to team boss Flavio Briatore.
Formula One's governing body has invited tyre makers to tender for the right to become the sport's sole supplier for three years from 2008.
Graham Rahal, the 17-year-old son of former Indianapolis 500 and Indy Car champion Bobby Rahal, led from start to finish in the Atlantic Championship's Grand Prix of Monterrey on Sunday.
Brandon Bernstein improved to 10-1 in Top Fuel finals Sunday, beating Cory McClenathan with a quarter-mile run of 4.531 seconds at 329.58 mph in the Pontiac Performance NHRA Nationals.
Spain's Daniel Pedrosa has grabbed his second consecutive pole position ahead of the French Moto GP, the fifth race of the motorcycling world championship.
Italian Valentino Rossi set the fastest time in Friday's first free practice session at the French Grand Prix.