The Women's Tennis Association has announced that Japanese tennis player Naomi Osaka has become the world's number one in women's singles rankings after she won the Australian Open on Saturday. She is the first singles player from Asia to make it to the top of the tennis rankings.
The WTA released its latest rankings on Monday. The 21-year-old player was ranked fourth going into the tournament in Melbourne.
Osaka's opponent in the Australian Open final, Petra Kvitova of the Czech Republic, is now ranked second. Simona Halep from Romania, who previously held the top spot, comes third.
The world rankings are decided based on points earned at tournaments during a 52-week stretch.