powerangle
Legend
If Novak were to "only" win 3 more slams, and nothing more and nothing less, would you sign up for it? Or would you rather leave it to nature, where you gamble in that he may win a lot more, less, or even no more slams. What's the break-off point where you would "sign up" for? Of course you can choose which slams he wins. 
I guess this can be applied for other fan bases as well. For Fed fans: would you sign up for just one more slam and absolutely nothing else? Where would you want his last great major win to be?
Rafa: just one more? Or is it fair to say he should be winning more than just 1 more major?
Murray: would you sign up for 1 more? 2 more?
Dimi: 10 more?

I guess this can be applied for other fan bases as well. For Fed fans: would you sign up for just one more slam and absolutely nothing else? Where would you want his last great major win to be?
Rafa: just one more? Or is it fair to say he should be winning more than just 1 more major?
Murray: would you sign up for 1 more? 2 more?
Dimi: 10 more?
