From a general point of view, which racket specifications would be better for singles or doubles? For example, is a head heavy/light racket better for singles or doubles? Is a stiff racket better for singles or doubles? And so on. I used the search function, except it seems slightly dodgy at the moment, telling me "The following words are either very common, too long, or too short and were not included in your search:" no matter what I search. Thank you.