German star Alexander Zverev clinched the world No. 1 spot in the ATP rankings on Thursday after defeating Tallon Griekspoor 6‑4, 7‑5 in the Vienna Open quarter‑finals, securing his first ever top‑ranking as the 2026 season draws to a close.
The 29‑year‑old was already guaranteed to finish 2026 as the year‑end leader, and with current No. 1 Jannik Sinner sidelined, Zverev will inherit the crown when the new rankings are released on Monday.
Having broken his Grand Slam drought earlier in the year with titles at the French Open and US Open, Zverev became only the 30th player since the ATP rankings began in 1973 to reach the summit.
In his opening match on Tuesday, Zverev survived four match points against Spain’s Martin Landaluce, eventually prevailing and setting up the second‑round clash with Griekspoor.
Against the Dutchman, Zverev broke serve in the first game and built a one‑set lead; after a 5‑5 deadlock in the second set he broke again to go up 6‑5, then clinched the match when a technical glitch on the electronic scoreboard was cleared and he delivered an unreturnable serve for the win.
When the updated rankings are published on Monday, Zverev will be 29 years and 196 days old, making him the second‑oldest player to claim the top spot for the first time, behind Australian legend John Newcombe.
Speaking to reporters after the victory, Zverev remarked, “Finishing the season as world number one is a dream realised; the hard work and the support from my team have finally paid off.”
Italian star Jannik Sinner announced in early October that a persistent knee injury forced him to end his season prematurely, leaving the top spot vacant and clearing the path for Zverev’s ascent.
The German now turns his attention to the ATP Finals in Turin next month, where the year‑end eight‑player showdown will determine the ultimate champion of the 2026 circuit.
Zverev’s rise adds him to a select group of German players who have previously occupied the No. 1 ranking, such as Boris Becker and Michael Stich, although neither achieved the feat after winning a Grand Slam in the same season.
The ATP ranking system calculates points from a player’s best results over the previous 52 weeks; Zverev’s 250‑point win in Vienna lifted his total above Sinner’s, cementing his place at the summit.