Latvian sensation, Jelena Ostapenka has stunned world No.4 Simona Halep to claim her first Grand Slam crown.

Chaz Mostert has narrowly missed out on the top ten in the final outing at the Sydney 500 after starting in 19th place in his Supercheap Auto racer.

Following a less-than ideal start to the race, a strong engineering strategy and multiple safety cars elevated the Supercheap Auto Racing FG X through the field.

A further late safety car pushed Mostert up to 10th, before falling to 11th at the hands of James Moffat on newer tyres.

“It was a bit of a wild one again,” Chaz said. “We just didn't have the pace which was frustrating but we changed a heap of things after qualifying and it certainly was a better race car than we had yesterday.”

“I got caught up in an incident on the first lap which didn't help but we pressed on and I thought we might get back into the top 10 but we fell one place short.”

“It was nice to be back racing this year and I've really enjoyed being back in the car after my time out late last year. We all want a lot more and I am already hungry to get going in Adelaide.”