Kenia Sinclair shaved nine-tenths of a second off her record time to win the women's elite mile race for the second year running, and then announced that she was planning on dominating the contest for many years to come.

The Jamaican, who ran a 4:43.1, was largely untroubled by the rest of the pack and came in a full eight seconds ahead of Ethiopian Belainesh Zenedkum who finished in a time of 4:51.3.

Sinclair's compatriot Korene Hinds was slightly further back in 4:53.4, and while Hinds and Sinclair laughed and joked at the finish, Zenedkum collapsed after crossing the line totally exhausted.

Sinclair and Hinds ran together for much of the race, only separating when the record holder pulled away down the stretch, and Sinclair insisted that she could go faster.

"I told her (Hinds, before the race) I was just going to go, and she was going to have to follow, and that's just what she did," said Sinclair. "I'm expecting when I run a flat mile it (my time) will be much faster.

"My first win here was very exciting, and I am very happy to be back again and hopefully I will continue to come until I retire."

The rest of the runners were more closely bunched with Sara Slattery fourth at 5:03.2, just ahead of Aziza Aliyu Abate (5:05.4) and Olga Firsova (5:07.4).

In the local adult women's race, Ashley Estwanik showed no effects of having given birth to her first child just six months ago as she returned to pip last year's winner Jennifer Alen by one-and-a-half seconds.

Although Estwanik's 5:17.6 was nowhere near the record time of 4:55 she set in 2007, the race was her second of the evening after she also ran in the Bermuda Triangle Challenge which will see her compete in today's 10K and tomorrow's Half-Marathon.

"It's been a really tough road back, and it's been a juggle to get the training in but I'm really happy with tonight and these girls were awesome," she said. "They pushed me, they pushed each other, and it was a great race."

While Estwanik seemed relatively comfortable over the last quarter-mile, the real race was going on behind her as Alen and Tamika Williams battled it out for the runners-up spot.

It was a thrilling contest that went down to the wire with Alen (5:19.1) finishing just two-tenths of second ahead of Williams.

May 24 Marathon Derby champion Victoria Fiddick finished fourth in 5:33.0.