Gender barriers in regards to which media you watch are arbitrary and, often, not worth worrying about. Hell, as an anime fan, some of the best anime out there that I've seen are shoujo or josei titles (including Fruits Basket, Chihayafuru, Princess Tutu, and NANA), meaning their target audience is female. I should mention that I'm a guy.
So if I don't feel any such arbitrary shame watching a series called Princess Tutu (PRINCESS. TUTU.), then you shouldn't feel any misgivings for watching what appears to be a pleasant little sports drama.