# Tennis: Alexander Zverev is guaranteed to replace Jannik Sinner as the men’s world number one for the first time in his career on Monday, after reaching the Vienna Open quarterfinals. The 29-year-old German defeated Dutchman Tallon Griekspoor, 6-4, 7-5, to become the 30th man to reach the ATP world number one ranking. He has had a dominant year, claiming his first two Grand Slam titles at Roland Garros and the US Open. Zverev will face British number one Arthur Fery in the quarterfinals, a repeat of their Wimbledon semifinal.
Tennis: Zverev will become 30th member of ATP world number one club on Monday