in gtd, katherine legge took over the class lead in the no. 86 michael shank acura nsx when the no. 33 riley mercedes-amg served a stop-and-hold penalty for speeding in the pit lane. legge lost it soon after to perera's no. 48 paul miller racing lamborghini and brekers took second place in the class for grasser. meanwhile, the top four overall cars were separated by six seconds and three cars were contesting the battle for second place. barbosa sidedrafted pagenaud with fourth-placed nasr slipstreaming both cars on the approach to the bus stop chicane. nasr out-braked both vehicles and passed them for second overall. graham rahal was now in the no.7 penske acura but was overtaken by barbosa and nasr. ten hours and 30 minutes in, alonso drove no. 23 united autosports car into the garage with a master brake cylinder failure and fell out of contention for a top ten finish. one second separated the trio of barbosa, nasr and rahal with pagenaud drawing slightly closer in fourth. nasr lost second to rahal in the 11th hour. pagenaud took the lead for a short time during the pit stop rotation for fuel. rahal extended his advantage upfront as barbosa and nasr lost time on cold tyres, but pagenaud gained first when rahal spun and stalled at turn one.