Arm injuries were up 112 per cent this year compared with the 2025 average, it added.The ATP expanded seven of its nine Masters 1000 tournaments to 12-day events under its OneVision strategic plan, with 2025 the first season in which the longer format was used across those events.The PTPA said the change had cut into the time players have to rest, train and travel between tournaments, despite players having voiced concerns about the demands of the schedule for years."Short-term commercial interests cannot come at the expense of player health," the association said "Protecting players isn't just about today's competitors, it is about protecting the future of tennis."The ATP has previously said players retain choices over their schedules and that it is working to create incentives for an appropriate number of matches to be played during the season.Spokespeople for the ATP and WTA Tours did not immediately respond to a request for comment.The PTPA called for the sport to take a player-health and data-driven approach to restructuring the calendar. It said players should have a meaningful role in shaping the schedule, while mandatory tournament commitments should be reduced to allow adequate recovery.It also urged the ATP to consider reversing the 12-day Masters 1000 format.Reuters