Erm, I'd say Giggs would be the top left-midfield player of his generation, unless I'm overlooking somebody...? Past his best now, but that's besides the point
I wouldn't consider either of those genuine left wingers, infact it seems to be a dieing breed in the modern game :-( Ronaldinho has gone off the boil, so there is no comparison there. He has come into prominence in the last few years, Giggs has been doing it since he had that daft curly mop as a teenager, its scary to think about Nedved is a cracking player, but injury prone, even more so than Giggs
Id say Giggs but unfortunately he never had the opportunity to turn it on at a world level. Joe did but.... There both a credit to there sports though.... Ive changed my mind its Joe...no gigs....no...
I would say Giggs as he has had far tougher competition in his career then mr Stay at home Calzaghe! also Joe will be exposed when he gets whopped by Roy Jones Jr and that will seal the door on this conman!