Overview
- Top seed Carlos Alcaraz defeated Alex de Minaur 7-6 (5), 6-2 for his first opening‑match win at the ATP Finals and a fifth straight victory over the Australian.
- Alcaraz can secure the year-end No. 1 by reaching the final with at least one round‑robin win or by sweeping his group, while Jannik Sinner must retain the title to stay in contention.
- Alexander Zverev won his Bjorn Borg Group opener 6-3, 7-6 (6) against debutant Ben Shelton to match Alcaraz’s fast start.
- Novak Djokovic withdrew with a shoulder injury after winning in Athens, bringing Lorenzo Musetti into the Jimmy Connors Group as a late replacement for his ATP Finals debut.
- Group play continues Monday with Taylor Fritz facing Musetti and defending champion Sinner opening against Felix Auger‑Aliassime at an event offering up to 1,500 points and a $15.5 million prize pool.