Marcus Armstrong turned the quickest lap, 1:09.8485, in the 30 minute warmup session for this afternoon’s 85 lap Sonsio Grand Prix.

The session ran green untill the final minute when Pato O’Ward lost an engine. McLaren is also changing the engine on Alexander Rossi’s car.

Santino Ferrucci seemed to push Romain Grosjean up close to the outside wall.

NBC goes on air at 3 pm Eastern. Green flag is at 3:45 pm.

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