What to know

• SHANGHAI — Alexander Zverev clinched the year-end No. 1 ranking on Monday to cap a breakout year in which he won his first two Grand Slam titles. Helped by a season-ending injury to Jannik Sinner, the 29-year-old Zverev will become the oldest player to achieve...S1
• Alexander Zverev clinched the year-end No. 1 ranking on Monday to cap a breakout year in which he won his first two Grand Slam titles.S2
• Zverev is currently No. 2 but will overtake No. 1 Sinner before the season ends next monthS3
• Alexander Zverev has clinched the year-end No. 1 ranking to cap a breakout year with his first two Grand Slam titles.S4