First contested in Filderstadt in 1978, the Stuttgart Open is the WTA's oldest indoor event in Europe, and its defining quirk arrived decades later. Since 2009 it has been the only tournament on the women's tour played on indoor red clay — a hybrid surface that opens the European clay swing inside a roofed arena. The event traded Filderstadt's club for Stuttgart's purpose-built Porsche Arena in 2006, and first played in Filderstadt in 1978, the long-standing Stuttgart tournament has been held in the city's Porsche Arena since 2006.
The character is unmistakable: a sub-6,000-seat indoor bowl, Easter-week scheduling, and a draw stacked well beyond its WTA 500 billing. Stuttgart routinely lures seven or eight of the world's top 10 — partly down to title-sponsor Porsche, the tour's most loyal women's-tennis backer, and partly down to the prize that has become tour folklore: there's after all a Porsche to be won there. It's got the best prize out there on tour. The indoor red clay plays quicker and truer than an outdoor court, rewarding ball-strikers who'd usually cede ground on the dirt.
No champion owns the building like Iga Swiatek. World No. 2 Iga Swiatek captured back-to-back titles in 2022 and 2023, beating Aryna Sabalenka in both finals — the second a 6-2, 6-2 closeout. Aside from losing her first final to Polona Hercog as a 17-year-old in 2019, Swiatek has been dominant in finals, winning seven in a row since then without dropping a set. Elena Rybakina broke the Pole's grip with the 2024 crown, handing Swiatek her only clay loss that season.
The 2026 edition crowned Rybakina again, who took the final over Karolina Muchova 7-5, 6-1 in the Porsche Arena. It cements her as the player most likely to inherit Swiatek's mantle as the event's modern standard-bearer, on a surface that flatters her flat, heavy first strike better than any other clay stop on the calendar.