Andreescu beat Serena Williams 6-3 7-5 in Saturday’s final to maintain a 13-match unbeaten run, where she also won the Canadian Open, to break into the top 10 for the first time in her career.“I don’t want to take anything for granted. These are the moments you live for and I’m just beyond blessed,” Andreescu, who moved up 10 places.
French Open champion Barty exited the tournament in the last 16 but regained the number one spot after last year’s champion Naomi Osaka was also knocked out at the same stage.
The Japanese, who also beat Williams in last year’s final, slipped to fourth in the rankings with Czech Republic’s Karolina Pliskova and Ukraine’s Elina Svitolina leapfrogging her to move up to second and third respectively.
Wimbledon champion Simona Halep fell two places down to sixth while Williams fell one spot to ninth despite her run to the final.