Jorge Lorenzo edged Marc Marquez by three thousandths of a second to top the second MotoGP free practice session at Indianapolis.
The two Spaniards were tied at the top of the timesheets on a 1m32.863s when the chequered flag came out to conclude the session, with Marquez ahead in the order due to setting the time first.
However, Lorenzo was on another lap as the clock ticked to zero, and he managed to improve by 0.003s to take first position away from the reigning world champion.
Andrea Dovizioso, who went fastest three minutes from the end, was third quickest and nearly three tenths back on the lead Ducati, just ahead of his team-mate Andrea Iannone.
Cal Crutchlow completed the top five, while Pol Espargaro set the sixth quickest time before being thrown from his Tech 3 Yamaha after suffering a high-side at Turn 14 late on.
Espargaro laid in the gravel for a few moments after the crash, having rolled over the top of his handlebars before hitting the deck, but he was able to walk behind the barriers unaided a few minutes later.
At the bottom of the top 10, championship leader Valentino Rossi ended a quiet session six tenths adrift of his Yamaha team-mate Lorenzo.
Rossi only appeared in the top 10 with two minutes remaining when he climbed from 14th to ninth, and he was shuffled back a place as several drivers improved at the end.
|6||Pol Espargaro||Tech 3||Yamaha||0.502s||18|
|8||Scott Redding||Marc VDS||Honda||0.583s||18|
|9||Bradley Smith||Tech 3||Yamaha||0.614s||24|
|11||Danilo Petrucci||Pramac Racing||Ducati||0.903s||19|
|12||Yonny Hernandez||Pramac Racing||Ducati||1.074s||19|
|14||Hector Barbera||Avintia Racing||Ducati||1.223s||15|
|17||Mike Di Meglio||Avintia Racing||Ducati||1.599s||17|
|20||Stefan Bradl||Aprilia Gresini||Aprilia||2.075s||17|
|21||Alex de Angelis||IodaRacing Project||ART/Aprilia||2.325s||21|
|22||Alvaro Bautista||Aprilia Gresini||Aprilia||2.424s||19|
|23||Toni Elias||AB Motoracing||Honda||3.476s||18|