Rafael Nadal and Roger Federer have a friendship which isn't the case for Djokovic and Nadal and the reason is just them being different people according to Corretja.
There is no dislike between the two legendary players as they are on very good terms. However, they also aren't what many would describe as friends and certainly not as close as Federer and Nadal are despite being closer in age. Speaking to Spanish radio, Corretja explained what their relationship is like:
"I think that Nadal and Djokovic have a respectful relationship but I
don't see them going to dinner together to discuss situations. In
tennis, everyone is very closed to their team. The same thing happened
to us, they are different habits, you have different schedules, another
way of being. Just
as Federer and Nadal had a rivalry but turned it into something closer,
Djokovic and Nadal have been on opposite paths at the level of ideals
and sharing things with the fans."
He added:
"I think they both have a very deep vision of the sport, they have given everything. We
are talking about one of the greatest rivalries in sports history. I
don't know if it's so easy to be the best friend of someone with whom
you risk so many things."
And concluded with:
"They respect each other, I don't think they have a friendship of sending each other WhatsApps, something that Roger and Rafa did, they were more relaxed. The most important thing of all is that there is mutual respect."