Khachanov became the third different first-time victor of a Masters tournament this year - joining Juan Martin del Potro and John Isner - and denied Djokovic a fourth title in a row ahead of his return to world number one on Monday. The victory required just one break in each set, 6-4, 6-4, and 79 minutes-which was just as well, given that the clock was approaching 11pm and his semi-final against Djokovic begins at 4.30pm Saturday.
"No idea if it was the last match", Federer replied when asked whether Saturday's loss to Djokovic could be the final time he plays in Paris.
Djokovic will replace Rafael Nadal as the world's top player on Monday after a two-year absence.
As the first set neared its conclusion, Djokovic showed signs of fatigue and Khachanov employed his aggressive game plan - hitting 18 winners in the opener - to break for a second time and move 6-5 ahead, before recovering from 0-30 to seal the first set. The 22-year-old Russian tennis player praised his opponent after the triumph.
Khachanov's momentum continued in the second set, and the Russian took a 3-1 lead and never looked back.
Djokovic was not allowed to settle into Sunday's final and was undone when Khachanov broke his serve at 5-5 before going on to win the first set. "I'm really pleased to overcome this kind of challenge".
Delhi Considers Restricting Plying of Private Vehicles to Fight Pollution
Kids are particularly vulnerable to air pollution because they're short and air pollution concentrates closer to the ground, the report says.
"It's one of my biggest titles so far, biggest achievement".
"I had some really tough and close matches against top guys and I was really believing that it has to turn around at one point", said Khachanov.
Karen Khachanov saved two match points against John Isner on his way to defeating the eighth-seeded American 6-4, 6-7 (9/11), 7-6 (10/8). Federer made a few unforced errors to give Djokovic a double mini-break, and Djokovic capitalized on the first match point on his serve after a long rally.
He improves to 4-0 in ATP World Tour title matches, having also lifted trophies in Marseille and his home capital of Moscow this year. "But nevertheless I think I've got nothing to lose", Federer said.
He secured victory on his first match point when Djokovic chopped a backhand return wide.
Russia's Karen Khachanov celebrates after winning against Austria's Dominic Thiem at the end of their men's singles semi-final tennis match on day six of Paris Masters tournament in Paris, on November 3, 2018. "And I told him to tell him to keep it down a little bit because he was going a little bit too much over the edge".