The Halle Open, officially known as the Terra Wortmann Open, is a prestigious ATP 500 grass court tennis tournament held annually in Halle, North Rhine-Westphalia, Germany. Established in 1993, it serves as a crucial warm-up event for Wimbledon and attracts many top players seeking to hone their grass-court skills. Notably, Roger Federer holds the record for most singles titles at the tournament with ten victories, solidifying its reputation as a favorite stop on the ATP tour. The tournament is known for its high-quality competition, enthusiastic crowds, and picturesque setting.