ATP Title Winner Retires, Alcaraz Eyes Paris Masters Victory

• An ATP title winner, unbeaten against Jannik Sinner, has retired from professional tennis.
• Carlos Alcaraz must win the Paris Masters to join Novak Djokovic and Rafael Nadal on an exclusive list.
• Jannik Sinner has ended his season, leaving Alcaraz as the second seed in the Paris Masters.
• Historically, the latter part of the season has seen more surprises in tennis.
• Winning the Paris Masters would place Alcaraz among elite tennis players.