Champions League: Borussia Dortmund undone by Mats Hummels red card

03-Nov-2021 22:14:00 | Deutsche Welle

Billed as a revenge game for the Bundesliga side, a refereeing decision ended up costing Borussia Dortmund the chance at a win over Ajax. Mats Hummels was controversially sent off in the first half.