Nadal will finish the season as world No1 ahead of Roger Federer whatever happens in the ATP Tour Finals in London this week.
Nadal has won two Grand Slams – the French and US Opens – and another four titles through 2017.
And, despite hurting his knee in Paris last month, he will face David Goffin at the O2 Arena tonight.
And he has offered an insight into his season, revealing who has helped him get back to the top of the sport.
“It’s been a fantastic season, a very emotional one after all the things I’ve been going through the last couple of years,” said Nadal.
“It’s not something I could’ve thought of one year ago, so it means a lot to me.
“None of this could’ve been possible without my family, my team… I can just say many thanks to all of them for the support.
“There have been some tough moments but everybody kept believing that things like this are possible again so without the work of all them, I wouldn’t be back where I am today.”
And Nadal’s uncle Toni expects him to do well in London – as long as the knee holds up.
“Training has gone very well,” Toni said. “We’ve practised at a very high level for this event. If Rafa’s knee holds up, we expect good results.”