There's a line in Jon Wertheim's Federer-Nadal book, "Strokes of Genius," about Fed's parents: "His parents weren't pushy; if anything, they were 'pully.' If they nudged him at all, it was to stop taking tennis so seriously." Nadal's father also stayed out of his son's tennis life. I've never heard a word about Murray's father's role in Andy's tennis and Djokovic's father was an active presence, but not on the tennis court.