Carlos Alcaraz's no-show in Basel came at a personal cost, as the Spaniard forfeited 180 ranking points from last year's semifinal run.
Alcaraz with 8,625 points is now 2,420 behind World No. 1 Novak Djokovic ahead of the Paris Masters this week. Djokovic will be playing for the first time in more than a month and remains the firm favorite to finish the season as the year-end No. 1 for a record-extending eighth time.
There is no movement in the world's Top 5, but Jannik Sinner was the biggest winner at the weekend. He defeated Daniil Medvedev for the second consecutive time in a final to win the Vienna Open. But the Russian will leave the Austrian capital as the winner of the ATP 500 Bonus prize money pool.
Holger Rune and Stefanos Tsitsipas swap places. The Dane could not defend his finalist points at the Swiss Indoors and dropped to the seventh with the Greek moving up to sixth, while Alexander Zverev moved ahead of Taylor Fritz into ninth.
Felix Auger-Aliassime held his nerve and spot in the world's Top 20. The Canadian was in danger of a huge ranking fall if he failed to defend his crown in Basel. But after saving a match point in the quarterfinal he defied the odds to win his fifth career title.
Lorenzo Sonego and Dusan Lajovic both re-enter the world's Top 50, while Stan Wawrinka drops out after a costly early exit in his home tournament this past week. The biggest mover in the world's Top 100 is Alexander Shevchenko, who rises 20 places to become the new World No. 63.
The Russian, who came through qualifying in Basel, reached his first ATP quarterfinal with main draw wins over Wawrinka and Taylor Fritz. And Tomas Machac's fine season is inching him closer to the world's Top 50. He climbs to a new career high of No. 64.
Roberto Bautista Agut fell out of the world's Top 50 for the first time in nearly 10 years. Injuries and inconsistency have set the Spaniard back for most of this season. But as one veteran falls, another is rising again. Gael Monfils climbs 10 spots to 79th. You can track all the latest movements by visiting our dedicated rankings page.