Answer
Witsel won the DFL-Supercup with Borussia Dortmund in 2019. The DFL-Supercup is a German football super cup competition that is contested annually between the winners of the Bundesliga and the DFB-Pokal. Witsel played in the match and helped Borussia Dortmund to a 2-0 victory over Bayern Munich. This was Witsel's first major trophy with Borussia Dortmund.