Marquez sets Indy pace
Championship leader Marc Marquez topped the timesheets in both MotoGP practice sessions in Indianapolis.
The Spaniard, who leads compatriot Dani Pedrosa by 16 points in the race for the title, beat Englishman Cal Crutchlow into second in the opening session before his team-mate Pedrosa provided the closest competition later in the day.
Pedrosa was only seventh-fastest in the first session but Repsol Honda once again showed that they will have the machine to beat in the second half of the season.
Marquez's time of one minute 40.781 seconds was three-tenths faster than Crutchlow in first practice with the factory Yamaha of Jorge Lorenzo third fastest.
Stefan Bradl was next on his LCR Honda while Valentino Rossi was fifth-fastest on the other Yamaha.
Pedrosa briefly held top spot in the second session but it was Marquez who came to the fore, beating his earlier time to register a lap of 1min 39.502secs.
His team-mate trailed by just eight-hundredths with Bradl in third spot after enjoying an impressive afternoon.
Lorenzo and Crutchlow on his Monster Tech 3 Yamaha rounded out the top five with sixth fastest.