You think Safin and Verdasco would need to buy a woman? I'd have thought they'd be surrounded by moist-gusseted groupies at all times.
If they were musicians then yes but in the tennis world, how practical is it to benefit from your groupies? I would have thought you would have to avoid it due to the reputation you would get, you'd get all the girls reporting on how you are in bed. With a prostitute you obviously do it thinking it will stay secret, you know, professional confidentiality.