Josef Newgarden, No. 2 Hitachi Team Penske Chevrolet-four-time Iowa Speedway winner, and Scott McLaughlin, No. 3 XPEL Team Penske Chevrolet ended practice session No. 1 on top of leader board with laps of 18.2420 seconds/176.428 mph, and 18.2897 seconds/175.968 mph respectively