India, Nov. 2 -- Tallon Griekspoor had described Alexander Zverev as "difficult to watch" in the US Open final in September, a comment that drew criticism and forced the Dutchman to clarify his remarks. Against Griekspoor, in the Round of 16 at the Vienna Open, the German won in straight-sets to secure his rise to the World No.1 spot for the first time.

The milestone, however, did little to change Zverev's fortunes on court. He suffered another defeat to a top-10 opponent, losing to Alex de Minaur in the semi-final. It was his ninth such loss in 12 matches against top-10 players in 2026.

Carlos Alcaraz eventually claimed the Vienna title, while Novak Djokovic's bid to strengthen his ATP Finals qualification hopes suffered a setback in B...