Joint INDY NXT by Firestone championship leader Nolan Siegel led the opening practice for the Indianapolis Grand Prix on Friday on the Indianapolis Motor Speedway.

Siegel was quickest at 1 minute, 14.9481 seconds in the No. 39 HMD Motorsports car on the 14-turn, 2.439-mile road course. Louis Foster was a close second at 1:14.9812 in the No. 26 Copart/Novara Technologies car fielded by Andretti Global.

SEE: Practice Results

Two series rookies occupied the next two spots on the speed chart. Bryce Aron was third at 1:15.2107 in the No. 27 Jaguar Land Rover Chesterfield entry of Andretti Global, while Caio Collet was fourth at 1:15.2799 in the No. 18 HMD Motorsports car.

Jacob Abel, tied with Siegel atop the series standings with 95 points, rounded out the top five at 1:15.3210 in the No. 51 Abel Construction car fielded by Abel Motorsports. Abel earned his first career series victory at the last event, April 28 at Barber Motorsports Park.

Up next is qualifying at 2:30 p.m. ET today, which will set the grids for both races of this doubleheader event. Live coverage will be available on INDYCAR LIVE and the INDYCAR Radio Network.

The first 35-lap race of the event is scheduled for 6:20 p.m. ET today, with live coverage on Peacock, INDYCAR LIVE and the INDYCAR Radio Network.