By this i mean you have been at a game and seen a fantastic player/legend playing.It might be that they didn't have a great game when you seen them or they were a bit past their best at the time but were still a big name. The players i would say for me were George Best and Johan Cruyff who were probably past their best and Ruud Guulit and Marco Van Basten who were just coming into their prime.
Gianluigi Buffon and all Italy national team 2-3 years ago. Also i got a picture with him. It was European Qualification and they came to Lithuania. Those who came to watch their training a day before could easily walk to the field, take pictures and talk with those players. It was fantastic!
One of my friend almost injured Massimo Ambrosini as he was sitting on some kind of metal construction which was very unsteady. My friend wanted to take a picture with him and sat near and something collapsed. Ambrosini almost fell on the ground and some parts of this construction could fall on him. Luckily he reacted quickly and nothing happened:)
Diego Marradona v Australia at Sydney Football Stadium. World Cup qualifier to the USA World Cup. He was past his best a bit, but was still a legend of the game. I think he ended up getting banned for failing a drug test in the world cup.