BERLIN - Arjen Robben and Thomas Mueller scored extra-time goals as Bayern Munich won the German Cup with a 2-0 victory over rivals Borussia Dortmund on Saturday. After the first 90 minutes finished goalless, Robben broke the drought in the 107th-minute before Mueller added a second in time added-on. Coach Pep Guardiola finishes his first season in charge of Bayern with four trophies having already won the Bundesliga title, Club World Cup and UEFA Super Cup . "When a team wins the German league title, it's already been a good season," said Guardiola. "That was the most important title, but of course we are very happy that we have won the cup ."Bayern lifted the German Cup for a record 17th time to claim the domestic league and cup double -- the Champions League was the only title to evade the Bavarian giants this season. But Guardiola admitted he deserved criticism from the German media in the wake of their 4-0 home drubbing by Real Madrid in the Champions League semi-final, second-leg. "The criticism was quite justified, I did things I shouldn't have done," said Guardiola."I made mistakes in our playing style and tactics against Real, but things like that can happen in big games against big clubs." Having also scored the late winner in the 2013 Champions League final against Borussia at Wembley, Netherlands winger Robben again broke Dortmund hearts. –AFP