Background

The Rio Open is an ATP 500 tournament played on outdoor clay courts in Rio de Janeiro, Brazil. Sebastian Baez is the defending champion, having won in 2024. Alexander Zverev enters as the top seed and world #2, fresh off reaching the 2025 Australian Open final. The tournament has seen some surprising runs, including lucky losers Jaime Faria and Camilo Ugo Carabelli reaching the quarterfinals.

Resolution Criteria

This market will resolve in favor of the player who wins the 2025 Rio Open men's singles tournament. Only one of the listed eight players (the quarterfinalists) will win. The market will only resolve N/A if:

• The tournament is cancelled or postponed beyond 2025

• The tournament format is substantially changed

In the case of a walkover or retirement during the final match, the player who did not retire will be considered the winner for market resolution purposes.