A run of multiple cautions in the final hour and 20 minutes threw fuel saving out the window and set up a memorable fight for glory in the endurance classic, which played into the hands of Deletraz.
The 26-year-old Swiss driver sported a set of slightly fresher tyres on the #40 Acura ARX-06 for Wayne Taylor Racing with Andretti, than Bourdais, who didn't take on a new set of rubber after their respective final pit stops.
Lining up third, Deletraz made quick work of the Felipe Nasr in the #7 Penske Porsche 963 and began to stalk the #1 Cadillac V-Series.R of Bourdais. Through multiple restarts after two brief caution periods, the final 15 minutes saw Deletraz inching closer with a clear advantage under braking on corner entry.
With less than six minutes remaining, Deletraz went ‘full send’ into Turn 7 and the two remained tangled as they used up every inch of ground on the track – and each other – in an effort to take control of the race. After making contact on multiple occasions as they went wheel-to-wheel through the narrow section of the 17-turn, 3.74-mile circuit, but it was Deletraz that was able to pull ahead.
Bourdais tried to claw back, but it wasn’t enough as Deletraz surged to victory by 0.891s after 12 hours and 333 laps.
“Every time I got close, there was a yellow pretty much, which is not helping me,” said Deletraz.
“I saw I was strong on braking, especially the low speed, T7, T10. He was close, defending well on the inside. I was on the outside, he squeezed me off. I realised quickly I was never going to make it on the outside, which fair enough. It's IMSA racing, it's tough.