Djokovic is more epic than both of them
Following a tennis player is like watching a movie. Djokovic's story is obviously much more dramatic than Roger's and Rafa's. He's more like a Cinderella of tennis.
Imagine a movie about Roger's life: a super talented kid, born in a upper middle-class family, grown up in one of the richest and peaceful countries in the world... his tennis is stunning, but his story is boring as hell. All he has had to overcome so far is his temper, LOL. I bet the director will have to add a lot of sex scenes to make the movie more funny...