German tennis star Alexander Zverev once again admitted that he was extremely disappointed with how his Munich campaign went as he is hoping to do well in Madrid and forget a disappointing Munich campaign. Last week, Zverev came to Munich hoping to deliver a strong week of tennis and win his first title of the year. Instead, Zverev ended up suffering a brutal loss to Holger Rune in his opener. Zverev, who was seeded at No. 1 and the top favorite to win Munich, stood no chance against Rune as the Dane beat the German 6-3 6-2. That result was …