Seconds after the green flag, the No. 4 Corvette C7.R. of Tommy Milner spun in Turn 4 after side-to-side contact with the No. 912 Porsche of Lance Vanthoor in the high-speed Esses.
Ben Keating clipped the stopped Corvette into the No. 33 Wynn’s Team Riley Mercedes-AMG GT3 and spun.

Both the Corvette and Mercedes were finished for the day,
while Ryan Hardwick in the No. 48 Paul Miller Racing 1st Phorm Lamborghini Huracan GT3 and Zach Robichon in the No. 9 Pfaff Motorsports Porsche 911 GT3 R were forced to pit after running over debris.
Running order after 1 hour of the 6 hours