88-second roof
The retractable roof over the centre court closes in 88 seconds so play continues through rain.
The centre court of the Terra Wortmann Open, the ATP 500 grass-court tournament in Halle (Westfalen), opened in 1993 as the Gerry Weber Stadion, became OWL Arena in 2020 and has been the heristo-arena since a naming deal in January 2026. It seats 12,300 for tennis and has a retractable roof that closes in 88 seconds; Roger Federer won the tournament a record 10 times.
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The retractable roof over the centre court closes in 88 seconds so play continues through rain.
Roger Federer won the Halle singles title ten times between 2003 and 2019, plus the 2005 doubles title.
Opened in 1993 as the Gerry Weber Stadion, the arena was renamed OWL Arena in 2020 when a regional sponsor consortium took ownership, and heristo-arena in January 2026.
The tournament, founded in 1993, was promoted from the 250 level to ATP 500 status in 2015.
The 'Haller Willem' regional train stops at OWL-Arena (Halle Westf.) station, a five-minute walk from the gates; event tickets double as local transit fares.
Take the 'Haller Willem' regional train to OWL-Arena (Halle Westf.) station, about 30 minutes from Bielefeld Hbf; by car use A33 exit 16 or 17. Nearest airports are Münster/Osnabrück and Paderborn/Lippstadt, about 45 minutes' drive.
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