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Ashleigh Barty capped her stellar year with the Newcombe Medal.Credit:AAP

A Wimbledon junior champion at just 15,the rising star will begin 2018 at No.17 in the world and a genuine chance of winning the Australian Open in January.

But the former teenage prodigy revealed she may have never returned to tennis had it not been for Dellacqua.

"Case,my best mate. She's not here tonight,but I don't think she quite understands how much of a massive impact she has had in my life,bringing me back into the sport to be honest,"Barty said.

"She was the one who started the ball rolling again,to sort of finish that unfinished business in doubles and now we've been able to have a pretty amazing singles and doubles year.

"Case is my best friend,my mum on tour,my shoulder to cry on through many times and she helped me through my darkest days and has been able to share this year with me and really helped through it the most.

"Case is probably the biggest thank you of all."

Barty also said she was indebted"to the boss",high performance coach of the year Craig Tyzzer,and conditioning guru Narelle Sibte for her"massive,massive impact".

"We started from zero. We had no ranking. We didn't know what tournaments we'd get into and,18 months later,to be here,it's been a really special year,"Barty said.

That it has. As well as making finals in Kuala Lumpur,Birmingham and Wuhan,Barty was runner-up in the French Open doubles with Dellacqua after the duo became the first all-Australian women's pairing in the open era to reach the title match at all four grand slam events.

In singles,Barty recorded five top-10 wins in total,her scalps including Karolina Pliskova,Garbine Muguruza and Angelique Kerber,who all enjoyed stints at the top of the rankings in 2017,as well as grand slam champions Venus Williams and Jelena Ostapenko.

Barty beat fellow nominees Daria Gavrilova,Kyrgios,John Peers and Jordan Thompson to claim the 2017 medal.

AAP