Stefanos Tsitsipas revealed a secret about Roger Federer after winning his opening match at the Laver Cup. The world No. 12 got revenge on Thanasi Kokkinakis on Friday, just weeks after the Aussie upset him at the US Open.

Stefanos Tsitsipas is hard to understand. After a period of considerable self-doubt, the Greek seems to be smiling again in Berlin. As a member of

Stefanos Tsitsipas pulled Team Europe even with Team World at the Laver Cup by beating Thanasi Kokkinakis 6-1, 6-4 on Friday. Team World led after Francisco Cerundolo of Argentina topped Casper Ruud of Norway 6-4,

Team Europe's Stefanos Tsitsipas of Greece got his side even with a 6-1, 6-4 victory in 81 minutes over Thanasi Kokkinakis of Australia.

Team World and Team Europe were level after victories by Argentina's Francisco Cerundolo for Team World and Stefanos Tsitsipas of Greece for Team Europe on the first day of the Laver Cup tournament at the Uber Arena on Friday.

Stefanos Tsitsipas secured a win for Team Europe against Thanasi Kokkinakis at the Laver Cup, leveling the field on Friday. Earlier, Francisco Cerundolo led Team World with a victory over Casper Ruud.

Team World and Team Europe were level after victories by Argentina's Francisco Cerundolo for Team World and Stefanos Tsitsipas of Greece for Team Europe on the first day of the Laver Cup tournament at the Uber Arena on Friday.