ATP Tour

McDonald tops 2025 Carbon Tracker leaderboard; winners donate $100,000 to charity

More than 300 players have taken part in the first three seasons of Carbon Tracker, the award-winning app that helps players track their tournament travel, understand their emissions and make more sustainable choices on Tour.

Mackenzie McDonald topped this year’s leaderboard, followed by Tom Hands, Yanaki Milev, Ryan Peniston and Valentin Royer. Across the season, players tracked a combined 2.3 million kilometres of travel and offset 585 tonnes of carbon.

The top five will direct a $100,000 prize pool to the charities of their choosing. McDonald, two-time Carbon Tracker winner (also in 2023), will donate his share to the USTA Foundation’s Mackie McDonald College Fund. Launched this year, the Mackie McDonald College Fund is an initiative that will provide college scholarships to students in under-resourced communities who demonstrate academic excellence, leadership, sportsmanship and passion for the sport of tennis, as well as support pathway programmes for younger youth, especially in the San Francisco Bay Area. 

Mackenzie McDonald, ATP Player, said: “It’s great to win Carbon Tracker for the second time. The initiative has helped me understand the impact of travelling between tournaments, allowed me to practically make more responsible choices, and shown me that even small changes add up. This donation from the ATP will be used to support the programmes and initiatives of my fund through the USTA Foundation, which helps open doors of opportunity for young people through the power of tennis, education and mentorship.”

Eno Polo, ATP CEO, said: “As a global sport with over 300 tournaments across the ATP and ATP Challenger Tour, travel is our number one environmental challenge. Carbon Tracker puts real numbers behind our impact, helping us take the steps we need to tackle it. Thank you to every player who took part, particularly to Mackenzie McDonald for leading the way this season.”

How Carbon Tracker Works

Track: Players log their travel to tournaments to calculate and understand their carbon emissions.

Offset: Players can mitigate their emissions by purchasing carbon credits through Gold Standard, supporting accredited climate and sustainable development projects. One credit represents the removal or reduction of one tonne of CO2 equivalent from the atmosphere.

Compete: Leaderboard points are awarded for a range of in-app activities including number of tournaments offset, tonnes of CO2 offset, and participation in sustainability quizzes, with double points awarded on key environmental days during the year.

Carbon Tracker’s long-term goal is to encourage more sustainable travel choices on Tour. Its dashboard gives players a clear breakdown of their footprint and the impact of different travel options. Aggregated data also helps the ATP to monitor key Tour-wide trends season to season. Carbon Tracker begins its fourth season in January 2026.