International soccer update

We don't do much soccer here at the Final Score. But here's an item about soccer star Ronaldo that I was tipped off to by my soccer-loving pal Out of Botte (author of the hit book "Fish Sticks" with Newsday's Alan Hahn. Soon to be a major motion picture. Or not.)
Anyway, here's the item:
Rio de Janeiro (dpa) - Brazilian striker Ronaldo decided to keep to himself at his Rio de Janeiro home Tuesday, following a scandal involving transvestites who worked as prostitutes.
Ronaldo's advisors told Brazilian sports website Globo Esporte that the Milan striker cancelled planned appearances at two television programmes and asked physiotherapist Bruno Mazziotti to continue treating his injured left knee at his home.
Comments (1)
Exactly how did Ronaldo injure his knee?
And if Anthony's mom is reading this, pretend that this is a serious question rather than a cheap attempt at humor.