Overview

• World No. 1 Carlos Alcaraz, debuting at the Japan Open in Tokyo, said he expects Jannik Sinner to alter his game and that he must be ready for those changes.
• Sinner, the top seed at the China Open in Beijing, said he is "changing a lot of small things" and accepts a higher error rate as he works to be less predictable.
• The adjustments are being trialed ahead of a possible reunion at the Shanghai Masters next month, where both are slated to play.
• Alcaraz leads their rivalry 10–5 after beating Sinner in the US Open final to reclaim No. 1, with the pair splitting this season’s four majors two apiece.
• Sinner opens against Marin Cilic in Beijing and has added physiotherapist Alejandro Resnicoff to his team, while Alcaraz starts in Tokyo against Sebastian Baez.