And with my fitness , which is obviously one of my biggest advantages , I know that I 'm able to do that .
Andrea Petkovic : I think the thing is that I know against these players I have to play every point 150 percent .
With my fitness , which is obviously one of my biggest advantages , I know that I 'm able to do that .
Andrea Petkovic : I think the thing is that I know against these players I have to play every point 150 percent .