MotoGP World Championship leader Casey Stoner maintained his US GP form by setting the fastest time during Saturday morning's final free practice session at Mazda Raceway Laguna Seca.
MotoGP World Championship leader Casey Stoner was fastest in first free practice at Mazda Raceway Laguna Seca, for the Red Bull U.S. Grand Prix, with a best time of 1min 23.410secs.