Robert Hartmann 2022 2021-2022 2020-2022 2020-2021 2020 Finished matches Referee 27 Aug 2022 1:30 pm FC Schalke 04 1 6 Union Berlin 1 27 Aug 2022 1:30 pm FC Schalke 04 1 6 Union Berlin 1 13 Aug 2022 1:30 pm Werder Bremen 2 2 VfB Stuttgart 6 13 Aug 2022 1:30 pm Werder Bremen 2 2 VfB Stuttgart 6