1) Simona Halep (Romania)
2) Maria Sharapova (Russia)
3) Serena Williams (America)
4) Naomi Osaka (Japan)
Explanation:
According to recently released “Women’s Tennis Association (WTA)” rankings, Naomi Osaka (Japan) ranked as world number one. Naomi Osaka is just 252 points ahead of world number two Ashleigh Barty of Australia in the top 20 WTA rankings.