Novak Djokovic, the 24-time Grand Slam champion, is not only making headlines on the court but also off it. Recently, his Professional Tennis Players’ Association (PTPA) filed a significant antitrust lawsuit against major tennis governing bodies. Simultaneously, Djokovic continues to champion sustainable hydration through his partnership with Waterdrop®.

Legal Battle: PTPA’s Antitrust Lawsuit

In March 2025, the PTPA, co-founded by Djokovic and Vasek Pospisil, initiated a class-action antitrust lawsuit against the ATP, WTA, ITF, and ITIA. The lawsuit alleges that these organizations operate as a “cartel,” limiting player revenue opportunities and suppressing competition from alternative tours. The PTPA contends that the current structure restricts prize money and enforces a grueling schedule, adversely affecting player welfare.

However, on May 21, 2025, the defendants filed a motion in a New York federal court to dismiss the lawsuit. They argue that the PTPA lacks legal standing, citing its informal structure, absence of official membership, and lack of dues collection. The WTA further contends that male plaintiffs should not sue a women’s tour and that female plaintiffs are bound by arbitration clauses in their contracts. The PTPA remains confident in its legal position and plans to respond accordingly.

What water bottle does Djokovic use?: Waterdrop® Partnership

Beyond the courtroom, Djokovic is making strides in promoting sustainable hydration. In 2023, he became an investor and global ambassador for Waterdrop®, a company revolutionizing the beverage industry with its Microdrink and Microlyte cubes. These sugar-free, vitamin-infused tablets dissolve in water, offering a convenient and eco-friendly alternative to traditional bottled drinks.

Djokovic’s collaboration led to the creation of the SILA x Waterdrop® line, featuring electrolyte hydration cubes designed for optimal performance. Complementing these are stainless steel, vacuum-insulated bottles bearing Djokovic’s name, available in various sizes and colors.

In 2024, Waterdrop® became the official hydration partner of the Australian Open, providing reusable bottles to players and staff. This initiative resulted in a 99% reduction in single-use plastic in player areas, with over 5,600 liters of water consumed sustainably during the tournament.

Conclusion

Novak Djokovic continues to influence the world of tennis both on and off the court. Through the PTPA, he advocates for fair treatment and better conditions for players. Simultaneously, his partnership with Waterdrop® underscores his commitment to health and environmental sustainability. As these initiatives progress, Djokovic’s impact on the sport and beyond remains profound.