Zidane had Thuram,Djorkaeff,Deschamps,Desailly,Dugarry,Henry and Ribberie with the French national team and Beckham,Ronaldo,Raul,Davids,Makelele,Cannavaro, Figo and Del Piero as teammates.
Zidane was great when he had talent around him, Giggs,Keane,Rivaldo and Bergkamp(in his prime) had to do it all by themselves, either in their respective national teams(Giggs,Keane) or in their clubs(Rivaldo,Bergkamp) I know many people will disagree with me, but I saw all of those greatnesses play in real-life(more than once) and I can assure you, Zidane never left a great impression. If you ask me for the best player of his generation, it will be either Ronaldo or Figo, not Zidane.