Tennis: Alexander Zverev guaranteed to become world No. 1

Alexander Zverev secured his place as the next world No. 1 by beating Tallon Griekspoor (6-4, 7-5) at the ATP 500 tournament in Vienna. The 29-year-old German will top the ATP rankings on Monday, November 2, replacing Jannik Sinner. He will become the first German world No. 1 since Boris Becker in 1991, and the 30th player in history to reach the top spot.