SYDNEY - Australian young gun Ash Barty remains at the top of the Women's Tennis Association (WTA) world rankings on Tuesday, despite going down in the semifinal stage of the Australian Open Grand Slam last month.

After claiming the Adelaide International title in January, the 23-year-old star was then bounced out of the final four in the Aussie Grand Slam 7-6, 7-5, by American Sofia Kenin.

Despite the loss, however, Barty retained her No 1 status, while Sofia Kenin who went on to defeat Spain's Garbine Muguruza in the final, surged up to the seventh place.

Romania's Simona Halep held on to the second spot, the Czech Republic's Karolina Pliskova held on to third, Switzerland's Belinda Bencic moved one place higher to claim fourth and Canada's Bianca Andreescu rounded out the top five places.

Meanwhile, former world No 1 from Japan Naomi Osaka dropped to 10th position, will 23-time Grand Slam winner Serena Williams from the US came in at ninth.