Alex Palou is a three-time IndyCar champion after finishing 11th in the series finale at Nashville, as Will Power’s loose seatbelts forced him to pit and took him out of contention early in a race won by Colton Herta.

It’s Herta’s first oval win after seven seasons of full-time IndyCar competition, and the Andretti driver treated the Nashville fans - a place where he lives himself - to joint donuts with Palou on the backstretch.

Here’s the full story of a brilliant season finale, and how the championship was won.

How Power lost the title

As a battle between polesiter Kyle Kirkwood and Josef Newgarden began up front, Power began to fall back in the early stages and was already down four spots from his fourth-place start when he peeled off to pit and went  five laps down.

Every driver has had belts come loose before, but the timing of this could not have been more costly for Power who lost five laps while the Penske team had to work around the steering wheel and a tight cockpit to secure the belts around Power’s lap.