6-7 6-3 10-6. Their win gave World their first point of the tournament against the Europeans.
South African Anderson led the charge by blasting 17 aces past the Serbian world number three in a 7-6 (5), 5-7, 10-6 victory that shifted the momentum after the World side had lost the opening two matches of the day to fall 7-1 behind.
Though Sock has turned into one of the best doubles players in the game, winning both Wimbledon and the US Open with Mike Bryan, he's still set on getting more out of his singles career. I haven't played doubles since last year, so I'm firing, I won my match last year, so I feel like I'm really confident from that match still.More news: UN Assembly Laughs as Trump Touts Achievements
Click on the video above to listen in on what Federer had to say to Djokovic.
Founded by Federer's management company Team8, in collaboration with Tennis Australia, USTA and Brazilian billionaire Jorge Paulo Lemann, the Laver Cup is a team event inspired by golf's Ryder Cup, and it carries the name of tennis legend Rod Laver.
"I feel like especially playing for the first time, which is always a little bit tricky, you know, we gelled really quickly right from the start, I think it was a really good match to get through".
But Anderson's victory and doubles success for American Jack Sock and Australian Nick Kyrgios closed the gap.More news: Hazard to be rested for PAOK clash
Team Europe need another six points to retain the title they won in the inaugural competition previous year.
The second edition of the Laver Cup is going down in Chicago this weekend.
Three points per match are on offer tomorrow, with the first team to 13 points lifting the trophy.
Edmund then raced to a 7-2 lead in the 10-point tiebreaker that is used in the Laver Cup when the first two sets are split.More news: Hulu Is Coming To The Amazon Echo Show