Novak Djokovic compared defeating Rafael Nadal at the French Open to scaling Mount Everest as he called his epic semi-final triumph over the 13-time champion as "one of my greatest victories".
Djokovic condemned Nadal to only his third loss in 16 years and 108 matches at Roland Garros to reach his sixth Paris final after a classic showdown.
In their 58th career clash, Djokovic triumphed 3-6, 6-3, 7-6, 6-2 and stays on course to capture a 19th major and become the first man in more than 50 years to win all four Slams twice.
Djokovic, the 2016 champion in Paris who had also beaten Nadal in the 2015 quarter-finals, will face Stefanos Tsitsipas in Sunday's final in what will be his 29th championship match at the Slams.
Tsitsipas had earlier become the first Greek to reach a Grand Slam final with a 6-3, 6-3, 4-6, 4-6, 6-3 victory over Germany's Alexander Zverev.
Defending champion Nadal, 35, who would have been the oldest finalist at the French Open in the modern era, remains tied on 20 majors with Roger Federer.
"It was a privilege to face Rafa in such an incredible match," said Djokovic after four hours and 11 minutes of intense action.
"Tonight it was my greatest ever match in Paris."
It was his second win in nine meetings at Roland Garros with Nadal, a sequence which also included devastating losses in the 2012, 2014 and 2020 finals.
"Definitely one of the top three matches that I ever played in my entire career," said Djokovic.
"Considering the quality of tennis, playing my biggest rival on the court where he has had so much success and has been the dominant force in the last 15-plus years, and the atmosphere which was completely electric. Just amazing."
It was Nadal's first defeat in 14 semi-finals in the French capital. "Probably it was not my best day today, even if I fought," said Nadal.
"Sometimes you win, sometimes you lose. I had a big chance. There were some crazy points but there was fatigue there."
Djokovic finished with 50 winners; Nadal committed 55 unforced errors under a relentless assault.
"It's hard to find words bigger than all the superlatives you can think of for Rafa's achievements in Roland Garros," added 34-year-old Djokovic, who now leads their series 30-28.
"Each time you step on the court with him, you know that you have to kind of climb Mount Everest to win against this guy here."
Nadal bemoaned the humid conditions which became heavier and slower as the evening progressed.
"We had been playing with very warm and high bounces. During the night the situation goes a little bit the other way," he said.
"So the bounce is a little less. The ball gets less top-spin. That's more favourable for him."
