With Petra Kvitova's victory over Kristina Mladenovic in the final of the St. Petersburg Ladies' Trophy on Sunday, Germany's Julia Goerges will make her Top 10 debut on Monday.
The German lost to Kvitova in three sets in Saturday's semifinal, but by virtue of Mladenovic failing to defend her title, the current World No.12 will leap over her, as well as the idle Johanna Konta, in Monday's rankings to World No.10.
Goerges, aged 29 years, 95 days, will be the fourth-oldest player to make her WTA Top 10 debut following Roberta Vinci (33 years, 4 days), Betty Stove (31 years, 100 days) and Francesca Schiavone (29 years, 349 days).
Vinci became the oldest player to debut in the Top 10 after winning the title in St. Petersburg two years ago.
"If it would happen, it's a nice thing, but as you probably know me, I'm not really crunching the numbers," Goerges told WTA Insider after a second-round win over Roberta Vinci in St. Petersburg. "It would just be a number in front of my name.
"Of course, it's a big bridge or goal that players are having, but I don't put much pressure on myself to achieve it because I think I put already the right moves in this direction so we'll see where it brings me."
Goerges is the 125th player to join the world's Top 10 since the computer rankings were introduced in 1975.
She also becomes the eighth German to reach the Top 10, joining Sylvia Hanika, Bettina Bunge, Claudia Kohde-Kilsch, Stefanie Graf, Anke Huber, Andrea Petkovic, and Angelique Kerber.
With Goerges sitting behind No.9 Kerber at No.10, Monday will mark the first time that two Germans are ranked in the Top 10 since September of 1997, where Graf and Huber occupied two spots.
Goerges had a 15-match winning streak stopped in the second round of the Australian Open, having ended 2017 as the champion at the Kremlin Cup in Moscow and the WTA Elite Trophy in Zhuhai, before winning the ASB Classic in Auckland over current World No.1 Caroline Wozniacki to start the 2018 season.
The achievement is the culmination of a resurgent 12 months for the German No.2, who ranked outside the Top 50 at this time last season.