The other three have clearly "mental issues" like Tsonga said about women
it's a completely different thing between men and women because men keep it cool on an emotive basis
(i.e. Tsonga yesterday joked just after Roger got a VERY lucky shot and he was about to lose the match) while women freak out crying and having bitchy handshakes (I could list endless), something I never saw in a men's match even after a hard loss... On the other hand, there are incredible headcases on a pure game basis
, like Tsonga and Berdych who sometimes look like their brain is everywhere but on the court where they're playing.