Tour Down Under stage four: Port Willunga › Willunga Township, 133.2km.

Kim Heiduk led home the INEOS Grenadiers in ninth after a reduced bunch sprint decided a tumultuous day's racing at the Tour Down Under. 

Heiduk keenly contested the uphill drag to the line, securing his best finish for the Grenadiers, followed closely behind by Ethan Hayter in 11th. 

Magnus Sheffield finished as part of the same group to remain fourth overall and retain the Zwift Best Young Rider's jersey ahead of the final stage. 

Crosswinds had caused havoc earlier on, with around a third of the peloton missing a split in the bunch. 

The Grenadiers contributed to the pace setting, with Ben Swift, Geraint Thomas, Luke Plapp and Heiduk all doing turns to ensure the front group were able to keep the chasers at bay. 

As the pace increased towards the end of the stage, the numbers in the front group further dwindled, with Heiduk and Hayter the first Grenadiers home from the reduced bunch.