The former Leeton reinsman drove his first group one winner as Ohoka Punter utilised the sprint lane to down stablemate Colt Thirty One and win the Sunshine Sprint.

The nine-year-old had only won one of his last 52 starts, spanning back to April 2017, but secured with fourth group one victory.

Diebert still doesn't believe the win has sunk in.

"It was real good and I was quite surprised it all happened but a win is a win," Diebert said.

"It still hasn't kicked in but I never thought I'd drive a group one so to do it is a pretty good feeling."

Born into a harness racing dynasty, with his grandfather Norm Diebert Snr and father Norm Diebert Jnr among trainers and drivers in the family, Diebert has spent the last three years in Queensland.

Rejoining the powerful Grant Dixon stable at Christmas has proved to be a masterstroke for the 24-year-old.

Ohoka Punter now heads to the group one Blacks A Fake, which he won in 2016.

It was part of a big night for Leeton horsemen.

Trainer Wayne Sullivan, who is currently holidaying in the United States, took out a group two NSW Breeders Challenge Blue with three-year-old filly Cee Cee Ambro at Menangle.

With Will Rixon taking over the driving responsibilities, Cee Cee Ambro brought up her eight career win to move through the $100,000 in prizemoney mark.

Rod Coelli finished second in the two-year-old fillies division with Dancinginthedark while Yirribee bred the winner of the two-year-old colts, Chasing The Wind.

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