New Internationali BNL D'Italia champion Karolina Pliskova rises up the rankings after her triumph in Rome - and now sits at World No.2.
She climbs five places to slot in just behind World No.1 Naomi Osaka.
Pliskova's opponent in the final also enjoys a significant rise this week - Britain's Johanna Konta is up 16 places to World No.26 after a great display on the clay.
It is her highest ranking since July 2018.
Here are some of the week's other big rankings movers:
Maria Sakkari (+10, No.39 to No.29): The Greek climbs the rankings after her run to the semifinal in Rome, when she beat Kristina Mladenovic, Petra Kvitova (through retirement), Anett Kontaveit, and Anastasia Pavlyuchenkova along the way.
Marketa Vondrousova (+6, No.44 to No.38): The Czech teenager reached the Rome quarterfinals, and defeated third seed and former World No.1 Simona Halep in the second round.
Victoria Azarenka (+7, No.51 to No.44): The two-time Grand Slam champion breaks into the Top 50 again to reach her highest ranking since March 2017.
Kristina Mladenovic (+9, No.63 to No.54): The Frenchwoman soared to the Rome quarterfinals after making it through qualifiers, and beat eighth seed Ashleigh Barty in straight sets in the Round of 16.
Rebecca Marino (+31, No.178 to No.147): The Canadian triumphed in Kurume last week, beating Yuki Naito in the final, and dropping only one set along the way.
Anna Kalinskaya (+32, No.180 to No.148): The Russian is the new champion in Saint-Gaudens, beating Wang Xiyu in the final, and defeating top seed and compatriot Vitalia Diatchenko along the way.