The Arizona Tennis Classic is a professional tennis tournament played on hardcourts. The tournament is part of the ATP Challenger Tour 175 and has been held annually in Phoenix, Arizona, since 2019, with breaks in 2020 and 2021 due to COVID-19. Known also as the Phoenix Challenger, it is renowned for having one of the strongest draws in the Challenger circuit, featuring top 50 players. Since 2019, the tournament has been held at the Phoenix Country Club, featuring three primary courts, including a new multi-level grandstand that was added in 2024 and 2025. The Arizona Tennis Classic was the first of now six ATP Challenger Tour 175 tournaments.