Nadal less of a concern for Federer than Djokovic. When was the last time Nadal beat Federer on grass or hardcourt? Six years ago.Said this time last year that Fed couldn't win another one unless Novak and Rafa weren't there.
I haven't seen anything to change that.
Fun fact, unless I'm mistaking, Fed has won 3 titles post 31, Novak is gunning for his 5th on Sunday. Those praying for his decline may be sorely disappointed.
And it's six-and-a-half years since Nadal beat Djokovic on grass or hardcourt.
That's a long time to be clay or bust.