Novak Djokovic was gracious in defeat and expressed his pride over "a most amazing last five months" after Karen Khachanov halted his 22-match winning streak to claim Paris Masters glory in a stunning upset on Sunday.
Djokovic was a firm favourite to match Rafael Nadal's record tally of 33 ATP Masters 1000 titles, but Khachanov outlined his promise by coming from a break down to secure a 7-5 6-4 victory.
Stefanos Tsitsipas was the last man to consign the 14-time grand slam champion to defeat at the Rogers Cup back in August and it was 22-year-old Khachanov striking another blow for youth over experience, claiming the biggest title of his career in Bercy.
Djokovic was full of praise for the Russian, who will move to a career-high 11th in the rankings when the Serbian replaces Nadal as world number one on Monday.
"I want to talk about how well he played all week," said Djokovic. "He absolutely deserved to win the match today. So all the credit to him, he deserves it.
"He's a young player, up and coming, but already an established player, a top player. And he showed great quality today and he showed why we're going to see a lot of him in the future.
"I'm satisfied of course and I'm going to be number one [on Monday] officially. What more can I ask for? I mean, I won 20-plus matches in a row and had a most amazing last five months of the year."
Khachanov has won all four ATP World Tour title matches he has taken place in and should go into 2019 brimming with confidence.
"It means the world to me," he said. "I couldn't be happier to finish the season like this.
"It's a breakthrough season, this title is a good one. Maybe I'm not crying, but still I'm really happy."
|Martial: Solskjaer lets me express myself|
|Djokovic sees off Tsonga to reach third round|
|Returning Cousins calls Warriors ´the most hated team in sports´|
|Halep injury ´nothing dangerous´|
|Warner picks up elbow injury in Bangladesh|
|Mkhitaryan returning to Arsenal training next week|
|Leeds United pounce for Real Madrid goalkeeper Casilla|
|Watson lights up Gabba before power cut forces abandonment|
|Superb Serena blows Bouchard away|
|Tevez, Hulk, Oscar, Lavezzi - how the CSL stars Dembele is following to China fared|
|Thiem retires from Australian Open|
|Osaka ´not telling´ when it comes to injury niggle|
|Fabinho enjoying Klopp´s management style|
|Halep battles past Kenin in Melbourne|
|Hartley to miss England´s Six Nations opener|
|Dembele departs Spurs for Guangzhou R&F|
|Nacho convinced Isco remains important to Real Madrid|
|Warriors star Curry sets NBA record|
|Raonic survives four-hour marathon against Wawrinka|
|Osaka powers through to Aus Open third round|
|Irving dominates in Celtics´ win over Raptors|
|Irving called LeBron this week to apologise|
|Ajax star De Jong wants to resolve future ´quickly´|
|Payton on Rams CB Peters: I have great respect for him|
|Rockets star Harden matches Chamberlain with historic performances|
|Nishikori survives Karlovic test in Melbourne|
|Vieira reunion felt really weird - Henry|
|´#BetAgainstUs´ - Edelman and Pats embracing underdog status|
|Van der Vaart: Isco the best player in the world|
|I haven´t seen Guardiola or Klopp do that – Lampard unhappy with Bielsa|
|Real Madrid always play to win, insists Casemiro|
|Royals pitcher Skoglund suspended for 80 games after testing positive for PEDs|
|Ronaldo and Juve celebrate Supercoppa Italiana title with Mayweather|
|We are not going to talk about Morata - Simeone reluctant to discuss striker|
|Madrid weak in Leganes loss, says Solari|
|Bologna and Banvit seal Champions League play-off spots|
|LeBron James to miss Thunder & Rockets games but nearing practice return|
|Leganes 1 Real Madrid 0 (1-3 agg): Isco starts as Solari´s side go through despite defeat|
|NFL playoffs 2019: X-factor for each NFC team|
|Mahomes: Chiefs must not repeat mistakes against Patriots|
|Higuain´s Supercoppa benching due to virus, says Milan boss Gattuso|
|Brown fires back at Arians over ´diva´ comments|
|Stone heading home from West Indies tour with back injury|
|Shazier will continue rehab with intention of playing again|
|That´s why we signed him! Allegri hails Supercoppa match-winner Ronaldo|
|Monaco on worst home run in club´s history after Nice draw|
|Atletico Madrid 3 Girona 3 (4-4 agg): Simeone´s side out on away goals|
|Gregg Williams is Jets´ new defensive coordinator|
|Ronaldo: Supercoppa triumph just the start for Juve|
|Monaco confirm Batshuayi talks|
|You know more than me! Bielsa´s Barcelona research surprised Guardiola|
|Juventus 1 AC Milan 0: Ronaldo heads Bianconeri to Supercoppa glory|
|Kane injury cannot be excuse for Tottenham – Pochettino|
|Woods to open 2019 schedule at Torrey Pines|
|Reported Liverpool target Dabbur to undergo Sevilla medical|
|Lebanon v North Korea: Radulovic calls on players to make history|
|MLS MVP Martinez signs five-year contract with Atlanta|
|WBC set deadline for Wilder-Fury rematch|
|Iran 0 Iraq 0: Team Melli top Group D after dull draw|
|Vietnam 2 Yemen 0: Quang Hai shines to give Golden Dragons hope|
|Bielsa admits to spying on all Leeds´ opponents|
|Valverde open to arrivals amid De Jong tug-of-war|
|Sexton named in Ireland squad for Six Nations openers|
|Higuain benched for Supercoppa Italiana amid Chelsea links|
|De Grandhomme, Latham and Santner back in Black Caps squad|
|Oman v Turkmenistan: Verbeek tells players to ´score as many as possible´|
|Japan v Uzbekistan: Cuper not distracted by potential last-16 opponents|
|Brown desperate for England recall|
|Lowry ties course record in Abu Dhabi|
|James is playing for Bayern future – Kovac|