Jannik Sinner becomes ATP world number one amid fierce competition

Jannik Sinner has achieved the rank of world number one on the ATP Tour, currently holding the title for 24 weeks. His reign features three separate stints totaling 90 weeks. Despite this milestone, Sinner is at risk of losing the top spot to Alexander Zverev, who has captured two Grand Slam titles this year and is positioned to finish as the highest-ranked player. Historical comparisons are being drawn to Yevgeny Kafelnikov, who became world number one in 1999 despite suffering six consecutive first-round losses.

• 2:00 AMYahoo Sports — He is the ATP player who became world number one despite losing six first round matches in a row