Will Vanspor maintain their form or can Istanbulspor spring a surprise? Find out on Sunday, August 23, 2026 at 20:30 at Home Arena, Germany, as these two Turkey. League 1 rivals clash once more. Harm Osmers is the appointed official. Forecast: Partly cloudy, 18°C. Potential absentees include Klein and Zimmermann. Their previous meetings: Istanbulspor 4 - 1 Vanspor (2025). Istanbulspor 4 - 3 Vanspor (2024). Istanbulspor 2 - 1 Vanspor (2023). Istanbulspor 1 - 0 Vanspor (2021). Istanbulspor 1 - 2 Vanspor (2023). Best bet: 3:0.