He will be caught up to Connors and Mac in no time though.. Reaching that level of Pete, Fed, and Nadal isn't out of the realm of possibility though if he can keep healthy.
Especially with the severe lack of depth in the game today. We dont know what Nadal will be like when he returns, he could be a mess.
Fed doesn't have a whole lot of time left. Hes declining with every year that passes. And if Murray isn't there to challenge Nole for the slams, its a walkover for Nole
Initially, I didn't think Novak could do it.. But people have to take into account there is really NO serious threats around right now outside of Murray. And possibly Fed on grass. Though one could argue that would be with a closed roof