In this file photo taken on Feb 15, 2021, Australia's Ashleigh Barty hits a return against Shelby Rogers of the US during their women's singles match on day eight of the Australian Open tennis tournament in Melbourne. (PAUL CROCK / AFP)

World number one Ash Barty was named WTA Player of the Year for the second time and US Open champion Emma Raducanu took the Newcomer of the Year title, the governing body of the women's game said on Tuesday.

Australian Barty, who won the title in 2019, won a tour-leading five titles this year including the second Grand Slam trophy of her career at Wimbledon where she beat Czech Karolina Pliskova in the final

Australian Barty, who won the title in 2019, won a tour-leading five titles this year including the second Grand Slam trophy of her career at Wimbledon where she beat Czech Karolina Pliskova in the final.

She also defended her title at Miami and triumphed in Melbourne, Stuttgart and Cincinnati to secure her third year-end number one ranking in a row.

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Raducanu, 19, entered the US Open as a qualifier ranked 150th in the world and ended it as Britain's first female Grand Slam champion for 44 years.

Czech Barbora Krejcikova took the WTA prize for the Most Improved Player of the Year following a stellar season in which she won the French Open singles crown.

She also excelled in doubles with playing partner Katerina Siniakova, with the pair earning the Doubles Team of the Year award which they also won in 2018.

In this file photo taken on Sept 11, 2021, Britain's Emma Raducanu celebrates with the trophy after winning the 2021 US Open Tennis tournament women's final match against Canada's Leylah Fernandez at the USTA Billie Jean King National Tennis Center in New York. (KENA BETANCUR / AFP)

Carla Suarez Navarro was named the Comeback Player of the Year award.

The 33-year-old announced in September, 2020 that she was being treated for early stage Hodgkin lymphoma and underwent months of chemotherapy and radiotherapy before returning at the French Open in June.