Jurgen Klopp delighted with Borussia Dortmund double

Borussia Dortmund coach Jurgen Klopp was left struggling for words after his side's 5-2 win over Bayern Munich in the German Cup final helped them secure their first ever double.

A hat-trick from Robert Lewandowski at the Olympic Stadium in Berlin gave Dortmund a comfortable victory over their bitter rivals.

"It was a final that no-one in Dortmund could have imagined going any better. We were cool, scored great goals... what's going on inside us definitely cannot be put into words," Klopp told Kicker.

Dortmund claimed their eighth Bundesliga title at the end of April.