Jack Sock and Nick Kyrgios paired up to defeat Rafael Nadal and Stefanos Tsitsipas as Team World cut Europe's lead to 7-5 heading into the final day of the Laver Cup in Geneva.
Sock and Kyrgios won Saturday's doubles 6-4, 3-6, 10-6 after Nadal defeated Milos Raonic in his first match since his US Open triumph in the singles.
"There was a lot on the line there," said Sock. "We obviously wanted to keep the overall weekend close. Being down 9-3 is different than 7-5.
"We've had so many chances this weekend, it's been crazy, so I think the score could be the other way round.
"I thought it was a high quality match and we're definitely happy to get the win."
"I think he deserved that first set for sure. Later in the match I think I started to play a little bit better."
"I was just trying to stay focused. If you can turn the momentum, the crowd gets back into it and I need some earplugs next time, it was just phenomenal."