Federer had a very defined peak from 2004-2007 where he was practically unbeatable except occasionally by Nadal on clay. Nadal has been consistent throughout his career particularly on clay and apart from a low in 2015-16, he doesn’t have high peaks or bad lows. Djokovic has had three peaks (2011, 2015-20161H, 20182H-2020) which are separated by many years - hard to explain his career and I always wondered why he couldn’t keep up his level at Slams between 2012-2014. So, we can compare Federer from 2004-2007, but which years would we take for Nadal and Djokovic as their peak.
I would take 2015-1H2016 Novak over any version of Federer or Nadal especially as he won 4 Slams in a row which is an unique achievement for the Big3 along with just about every Masters 1000 tournament - plus as a bonus, he gave Nadal self-confessed “anxiety issues” and beat a healthy Nadal in straight sets at Roland Garros. I will let Nadal make the argument for Novak’s peak being the highest from an interview he gave in early 2016 after being shellacked by a BOATing Novak.
Nadal interview - After losing 6-1 6-2 the final in Doha against the Serb, Rafael Nadal was quite honest in his press conference.
“There is not much you can do when your opponent plays like that. He was just perfect. I have never seen someone playing at this level, and I have been following the sport for many years now. I don’t feel frustrated after the match, is not like I feel in a rush to win, I have 14 Grand Slams not zero or one. The priority for me is to be happy while doing what I do. We will see if Novak will play like this in two weeks, or in 5 months, but all you can do is wait and see” said the Spaniard. On his plan to beat the Serb in the future, after losing 5 times in a row against the world No.1 Rafael said:
“
You have two choices: either you get frustrated and you give up, or you wait. And I am going to wait. Obviously I am going to work hard to be ready for when the opportunity comes. To play against Novak in these conditions, with him playing like this, it was almost impossible for me to beat him today. I know I can do some things better, and I am going to work on that as well”.
Nadal didn’t mention that he was also going to sic his fellow-Spaniard Pepe on Djokovic to wreck his mojo for a couple of years