Ashleigh Barty, now World Number One

Australian Ashleigh Barty has toppled Japan’s Naomi Osaka as female tennis World number one, according to the new rankings that will be released on Monday.

The 23 year-old Barty became only the second Australian woman to top the world rankings when she won the Birmingham WTA title on Sunday, beating Julia Goerges 6-3, 7-5 and extending her winningh streak to 12 matches.

She was last defeated on May 16 by Kristina Mladenovic at the Italian Open in Rome.

The French Open champion emulates Yvonne Goolagong-Cawley, who held it for a fortnight in 1976.

Barty could never have imagined winning a Grand Slam title and rising to the summit of the rankings when she took a break from professional tennis in 2014.

The Queenslander has gone from strength to strength since returning at Eastbourne three years ago following a brief stint as a professional cricketer.

Barty, the first player from her country to win Roland Garros since Margaret Court in 1973, featured for the Brisbane Heat cricket team in the Women’s Big Bash League four years ago, playing nine matches with a top score of 39.

“No, not at all,” Barty said after the French Open of her hopes of winning a major title when she started her comeback with a surprising run to the Eastbourne semi-finals in 2016.

“I was very nervous (at Eastbourne) because I didn’t even know if I would get in the draw…

“I remember at the end of that week, my body was shot. It wasn’t used to playing matches again. It was incredible.

“To know that it was three years ago — it feels like only yesterday that we were there and in the same breath it also feels like it was a lifetime ago.”

Barty lost in three Grand Slam doubles finals alongside Casey Dellacqua in 2013, but had only won two singles matches and lost nine at the big four tournaments when she stepped away five years ago.

Barty did not even play another Grand Slam singles main-draw tie until 2017, and only reached the second week of a major for the first time at least year’s US Open.

But she does not think she could have seen such a stunning upturn in her fortunes without taking a hiatus.

“Absolutely not. I don’t even know if I’d be sitting here talking to you if I was playing tennis (and) if I didn’t step away,” Barty said.

“It’s obviously a part of my life that I needed to deal with, and I feel like it was the best decision that I made at the time, and it was an even better one coming back.”

Barty’s game is built around a strong serve and an excellent backhand slice, a rarity in the women’s game.

Her unusual style appears perfectly-suited for grass-court tennis, with the start of Wimbledon on July 1 looming large.

Barty said the clay-court French Open, which she won with a 6-1, 6-3 final thrashing of Czech teenager Marketa Vondrousova, was not the last Grand Slam she expected to win, potentially firing a warning to her Wimbledon rivals.

With 23-time major champion Serena Williams’ failure to win a Slam title since January 2017 leaving the women’s game more open, Barty now hopes a rivalry can blossom with Osaka, two years her junior.

“I think we have only played a couple of times, but I’m sure that we’ll play many more times over both of our careers, and hopefully they’re in big matches.”