Imo he lost them as many big games as he won them. Same for England. For every FA Cup final screamer or Olympiakos goal there was a slip or a wayward pass that cost them goals and points at crucial stages. Single-handedly threw away the France game for England at Euro 2004 and then lost Liverpool the 2005 League Cup final on his own. Great player, huge limitations.
Thought he was a great player back then. Now after Pep has helped me understand football better, I just see him as someone who could never do the simple (usually best) thing. He really did think it was all about him.