Not if the issue at stake is something other than soccer!

I genuinely can't say Pelé is or was the greatest player ever, because I've only seen his 'highlights'. I suspect that's the case for most of the people posting in this thread.

In terms of greatest players I've ever watched - as in watching a full game in which they've played, because then you get to see how they work off the ball as well as on it, in the full context of an actual match - is Zinedine Zidane.