Winx never fails to disappoint Debbie Kepitis but the miracle the champion racemare conjured in the Warwick Stakes win left the part-owner awestruck.

"To actually get there on the line like she knows, she put every single bit of herself in that win," a shaking, teary Kepitis said.

The two-time Cox Plate winner needed her best - and a handy tailwind - to turn an awkward, slow start into her 18th straight victory only achieved in the final metres.

For Kepitis' husband Paul, Winx missing the start by four lengths wasn't as concerning as where she found herself with just 200m to go.

The pedal might have been down on the world's biggest engine but, three lengths out in front, stablemate Foxplay was also giving her all.

The Kepitises just hoped.

"You knew she was always going to keep coming and coming," Paul said.

"But when Foxplay was out there in front, I just hoped we could run her down."

Fellow owner Peter Tighe never gave up but his relief was palpable.

"It just goes to prove she is something special," he said.

"Boy, oh boy, the heart missed a few beats coming up the straight.

"To do what she did was just phenomenal."

A lightning quick final 200m - just 10.72 seconds according to one data site - was just enough.

"She'll settle after this and her nerves will be calmed," Paul Kepitis said.

"Hopefully like ours as well."

Winx is expected to return to Randwick in two weeks for the Group Two Chelmsford Stakes (1600m).