Tennis fans around the world got to see just how much the occasion meant to Federer and his long-time friend and rival Rafael Nadal, but for some of the younger Team Europe members like Casper Ruud and Stefanos Tsitsipas it was also an incredibly emotional experience and one they won't soon forget.
World number two Ruud said that seeing the chemistry and genuine affection between Federer and his long-time rival Nadal at the O2 Arena will stay with him for a long time.
"Having those two together in Roger's last match was incredible to witness," Ruud said ahead of his debut match at the Korea Open in Seoul.
"I was lucky and I was honoured that I was able to be a part of the team. I learned a lot and took a lot of joy with me from the experience.
"It was very fun to be around them. They joke with each other all the time," he added.
"Obviously they're older and at a later stage in their career and it's inspiring to see that they have the motivation to keep going and that they are eager to play and enjoy each other's company."
Meanwhile, it was clearly a very memorable experience for fellow young gun Tsitsipas as well.
On Wednesday, the Greek star posted a video of himself sleeping in bed alongside a racket signed by Federer, with a caption that seemed to suggest he was still dreaming of his Laver Cup experience.
Speaking in London last week, Tsitsipas said he was fully aware of what a special occasion it was.
"It's such a privilege to be here," he said. "I have worked hard to be sitting right next to them. I have sacrificed a lot, and I'm super proud that I'm able to share this by their side.
"This is the ultimate that you could ever ask, you know. We have so many great champions, literally the biggest gladiator that tennis has ever seen ever. Not even in this era. Ever.
"For me to be here and be kind of a big part of it is something that will definitely remain unforgettable, a big piece of, let's say, a big highlight of my life and something that I will definitely be able to recall for many years to come.
"All of these guys are amazing. Djokovic, he's one of the greatest returners I think ever, close to Andre Agassi.
"Andy Murray is such an incredible fighter and never gives up. You know, whining a lot as well which is unusual for someone in the top four.
"Rafa is incredibly humble. Something might have broken in there, because, you know, so many Roland Garros titles in a row is not humanly normal. I think there needs to be like a filter change because this is incredible.
"And Roger is Roger, someone who has been doing things so effortlessly. He's an example - all of them are examples to younger kids, but he is an example to everyone for how not to do things, because you will fail for sure if you try and play like Roger."