It wasn't Woods first visit to Nadal's booth either - he was there for the semifinal.
After so long with his protege, Toni will be stepping down from coaching to spend more time at his academy in Spain, this match marking the last for the pair.
"For me, what is more important, more than winning slams is to be happy", said the 31-year- old Spaniard, "I am happy if I am healthy, and happy if I feel competitive and that's what happened this year".
At 17, Nadal won his first match against Federer.
"Tennis is not all about the Grand Slams, so there are tournaments to come and I'm excited about this last part of the season".
It has been a remarkably stable relationship.
China's Wu Yibing beat Axel Geller of Argentina 6-4, 6-4 to win the U.S. Open junior boys' singles title. Nadal then dominated the Argentine star - who led his country to its first Davis Cup trophy a year ago and beat Nadal at the Rio Olympics - in the semis, which was somewhat like winning a Democratic primary for mayor in Chicago.
Moya knows he has huge shoes to fill.
Amanda Anisimova won the girls singles title, preventing 13-year-old Cori Gauff from becoming the youngest champion of the event at the U.S. Open.
"After the first two, three months of the season, you see that I am playing well, and if I am playing well on clay, I normally am going to have my chances".
The South African who attended the University of IL had himself a grand tournament in his 34th Grand Slam try, but in the final, he had stood opposite a force still ferocious after all these years, a player in his third Grand Slam final this year and his 23rd Grand Slam final all told, the first having come at age 19.
"I really want to congratulate Rafa", said runner-up Anderson. (His) forehand is okay again. Comparing tennis with the same individual sport that also has four majors per year, golf has Jack Nicklaus with 18 majors and Tiger Woods at 14. He has not been injured, which for me is key. He consistently got deep into Anderson's service games, standing way back behind the baseline to the point where you could not see him on the television broadcast.
"This tournament was different because we play against [Alexandr] Dolgopolov, [Andrey] Rublev, good players but not the top". This fortnight also marks Toni Nadal's last major coaching Rafael.
Nadal remained at No. 1 by winning his second Grand Slam trophy of the season and 16th of his career with a 6-3, 6-3, 6-4 victory over Kevin Anderson in the final at Flushing Meadows on Sunday. An incredible feat as it may be, this is not surprising as Federer and Nadal have ended the year as the top two ranked players on the ATP tour for six consecutive years in a row from 2005 to 2010.
He said: "We look forward to that".
"I am 31, I'm not 25, but I still have the passion and the love for the game".