With four classes – GTP, LMP2, GTD and GTDPRO – running fastest lap practice times between 1:36.327 and 1:49.983. There will be plenty of action for fans. Some cars and drivers to watch:

Two-time IndyCar Series champion Will Power set the fastest time of on Saturday in GTD PRO in the No. 75 Express Mercedes-AMG GT3 at 147.899. Tommy Milner in the No. 4 Corvette Racing by Pratt Miller Motorsports Corvette Z06 GT3.R ultimately moved ahead during practice at 1:47.835. Ford Racing No. 66 (B. Barker / D. Olsen / M. Rockenfeller) ultimately posted a 1:47.863.