Shane Van Gisbergen has clocked the fastest time during practice for the races in New Zealand.
Jamie Whincup and Scott McLaughlin were second and third on Saturday ahead of the two 100km races.
Experts are predicting the event at Pukekohe Park Raceway could decide the title.
ARTICLE CONTINUES AFTER THIS ADVERTISEMENT
Six-time Supercars champion Whincup is 148 points behind van Gisbergen who is leading the championship race.
For more on this story click here.