The 23-time major champion won the Australian Open in January 2017 while still in the early stages of her pregnancy before giving birth to daughter Alexis Olympia in September of that year.

Williams returned at Indian Wells in March 2018, having dropped as low as 491 in the standings, but Tuesday's (AEDT) update saw the 37-year-old ascend back to number 10 in the world.

The American has not featured this season since a quarter-final defeat to Karolina Pliskova at the Australian Open but has moved up the rankings due to some of her rivals' failures to defend their points.

Naomi Osaka, who triumphed at Melbourne Park after defeating Williams at the US Open in the final major of 2018, remains at number one, while Simona Halep and Sloane Stephens each move up one place to second and third respectively as Petra Kvitova drops down to fourth on the list.