I can honestly say I haven't watched a single point from this year's event so far and I'm not sure I will. As much as I hope Novak goes on to win the gold medal, tennis in the Olympics just doesn't do anything for me at all.
It should hurt every little bit as much as it did at the time. Beating Nadal and Djokovic back to back at the age of nearly 38 would've arguably given Federer as strong an argument for GOAT as Novak completing the Double Career Grand Slam gives him. But he blew it and he only has himself to blame.