The Halle Open, currently sponsored by Gerry Weber and called the Gerry Weber Open, is a tennis tournament held in Halle, North Rhine-Westphalia, Germany. Held since 1993, the event is played on four outdoor grass courts and is a part of the ATP World Tour 500 series on the ATP Tour schedule. It is seen as a warm-up for the Wimbledon Grand Slam tournament, also on grass courts, which begins towards the end of June.