If he teams up with Carlos Alcaraz, he maybe will have gold medal in this Olympics and can say goodbye after that. Carlos will not have problem to team up with Nadal who is his idol before Carlos became successful last three years.
https://en.wikipedia.org/wiki/Rafael_Nadal
After having injuries and fitness difficulties he is currently having no power and quality which we have in his game 18 to 20 months back which is creating problems for him, but things are still well organized for his good end of long career in last few games he is taking more time for beating his opponents which is clearly telling all about his future which is near the end.
After Roger Federer now he is having to leave and then Djokovic will be also going to leave things after ruling this tennis world for long time.