Prague, Czechia, 24 September 2017 | AAP/tennis.com.au

Nick Kyrgios has come from behind in a Laver Cup singles win over home-grown Tomas Berdych in Prague.

The world No.20 beat the former Wimbledon finalist 4-6 7-6(4) [10-6] after Team Europe superstars Roger Federer and Rafael Nadal beat Sam Querrey and Jack Sock respectively on day two.

The win helped Team World close the points gap against Team Europe to 7-3, before Europe extended it to 9-3 lead when the highly anticipated doubles pairing of Federer and Nadal proved too strong Querrey and Sock, prevailing 6-4 1-6 [10-5].

“Obviously I had a slow start,” Kyrgios said. “I didn’t think I was comfortable just with how big the court is and stuff like in an actual match. Like, I practiced on it, but getting out there in the match, it took me a bit of a while to feel comfortable.

“I thought he served unbelievably well. He was playing well from the back. Obviously had a couple unforced errors, but the way he was hitting it wasn’t giving me much rhythm at all.”

Kyrgios said he was enjoying the experience and support that Team World captain John McEnroe brought to the side of the court.

“I’m still pretty new with Johnny on the sidelines. I’m still getting to know him, as well,” Kyrgios said.

“After today I feel very comfortable. Even when I was just serving, hit a good serve, he instantly says, you know, ‘Great serve’. I love that sort of feedback.”