The Hamburg Open is a historic ATP 500 tennis tournament held on clay courts in Hamburg, Germany. For 2025, the event moves to May 17-24, placing it before Roland Garros. Staged at the Rothenbaum Tennis Center, featuring Germany's largest tennis stadium with a retractable roof, the tournament welcomes 32 top singles players and 16 doubles teams. While local hero Alexander Zverev famously won in 2023 (the first German champion in 30 years), the defending 2024 champion is Arthur Fils. Search "Hamburg Open 2025 schedule" or "Rothenbaum tennis tickets" for event details.