New York, NY, USA, 10 September 2018 | AAP

Australia’s Ash Barty landed her maiden Grand Slam title as she teamed with American CoCo Vandeweghe to win a thrilling US Open women’s doubles final in New York.

Barty and Vandeweghe saved three match points to edge out second-seeded Australian Open champions Timea Babos and Kristina Mladenovic 3-6 7-6(2) 7-6(6) in the first-ever women’s doubles Grand Slam final decided in a third-set tiebreak.

“Obviously we’ve only played a handful of tournaments together this year, but we’ve had pretty good success right from the get-go,” Barty said.

“This last fortnight has been really fun on and off the court. We’ve been relaxed. We’re very hungry to go as deep as we could. It was really nice to be able to play a pretty clean tournament.”

Barty had lost all four major doubles finals with retired compatriot Casey Dellacqua, falling short at the Australian Open, Wimbledon and the US Open in 2013 and at last year’s French Open.

But there was no denying the 22-year-old on Sunday, Barty and Vandeweghe prevailing after fighting off two match points in the second set and another in the deciding breaker.

“There were so many ebbs and flows through the match,” Vandeweghe said.

“I told Ash, ‘Listen, there’s no one I’d rather be out here than with you right now. I believe in you. We’re going to get this done.’

“We’ve been talking about this moment.”

Barty’s triumph completes a memorable US Open for the Queenslander.

Was only a matter of time @ashbar96 congrats to you and @CoCoVandey first of many #GrandSlam titles @usopen

— Todd Woodbridge (@toddwoodbridge) September 9, 2018

She also reached the fourth round of the singles, marking the first time the former Wimbledon junior champion had made the second week of a Slam.

Barty also won the US Open Sportsmanship Award, recognising excellence in sportsmanship during the American lead-up events and the final Grand Slam of the season.

“It’s very humbling,” she said.

Barty is the seventh Australian to win the US Open women’s doubles title, joining four-times champion Margaret Court (1968, 1979, 1973, 1975), Judy Tegart-Dalton (1970-71), Wendy Turnbull (1979, 1982), Hana Mandlikova (1989), Rennae Stubbs (2001) and Samantha Stosur (2005).