Team World had staged an unbelievable fight back to give themselves a shot at the Laver Cup title on day three.
Nick Kyrgios knew a win against Roger Federer would set up a one-set, winner-takes-all doubles decider.
And he started his match against the Swiss brightly, winning the first set 6-4 to give Team World hope.
However, Federer dug deep and battled back to win the second set 7-6 and the final set 11-9 on a tiebreaker.
The result meant Team Europe clinched the Laver Cup title 15-9 and Federer was visibly delighted, celebrating the win as he would a Major.
But for Kyrgios it was all too much who broke down and had to be consoled by his Team World captain John McEnroe.
Speaking after the final, McEnroe said: “I just want to say congratulations to team Europe it was a hell of a three days, unbelievable.
“I am so proud to be part of an event called the Laver Cup. Rod Laver was my idol growing up and I see my great rival Bjorn Borg on the other side, it was jut amazing.
“Let me just say on behalf of Team World that we are very proud to be here and you fans have been unbelievable, absolutely amazing.
“I’m most proud of these guys right here [Team World] who put their heart and soul and everything into this and we were so, so close to pulling this off.
“Thanks for having me as captain, I appreciate it and I’m proud of you guys.
“We’ll see you next year.”