Halle Open
The German Open Hamburg was part of the Grand Prix Super Series from 1978 to 1989, and the ATP Masters Series from 1990 to 2008, whereas the Eurocard Open was part of the ATP Masters Series from 1995 to 2001. The German Open Hamburg is an ATP World Tour 500 since 2009, and the Halle Open was upgraded to that category in 2015. Also, the ATP Tour World Championships and Grand Slam Cup were played in Germany from 1990 to 1999. Meanwhile, the Women's German Open was a Tier I tournament from 1988 to 2008, and the Women's Stuttgart Open is a WTA Tier II / Premier tournament since 1990.