Germany’s Olympic tennis champion Alexander Zverev revealed Saturday he has long had type one diabetes and has created a foundation to help others battle the disease. Zverev, was diagnosed at the age of four. “When I was a little boy I didn’t think much about it, but later I thought more and more about it,” he said. “I want to show that you can go a long way with this disease. “Now, many years later and also with success behind me, I feel comfortable and confident enough to go public with this initiative.” Zverev wants to be a role model for people who already have the disease, but also a supp…