The Djoker had that semi won rather handily, until he lost focus before closing it out in three. For whatever reason or reasons, he let that third set get away from him and Murray made him pay for it. He let things get away from him last year. He will probably be nervous out there tomorrow, but I believe he will still bring it for the final - nerves and all.w
Olympic Gold is not something we can use to compare the greats in the history of tennis. From 1924 to 1984 it wasn't part of the Games. It's nice to have that trinket, but it's not something that should be weighted as heavily as a slam. While the YEC's are not a real tournament either, it is a round robin between the eight best players in the world... something I doubt gold medalists like Massu or Rosset would be playing often.
If the Djoker wins Sunday, he has something neither Sampras, Nadal or Fed will ever have. If he wins two more majors after that, with 14 slams and having held all four slam titles at the same time, it immediately puts him past Sampras and Nadal.