Marc Marquez wins U.S. MotoGP in U.S. . MotoGP legend Valentino Rossi , who claimed a promising second in Qatar , could only manage eighth in America on his Yamaha , struggling with grip on his front tires . Second straight win at the Circuit of Americas for title holder . Repsol Honda teammate Repsol Honda finishes Second . Marquez two wins from two in year title race .
Marc Marquez wins U.S. MotoGP in U.S. . Second straight win at the Circuit of Americas for title holder . Repsol Honda teammate Repsol Honda finishes Second . Marquez two wins from two in year title race .