Roger Federer and Alexander Zverev have won their Laver Cup doubles match.
The duo's straight sets victory over Jack Sock and Denis Shapovalov results in Team Europe leading Team World 3-1 after day one in Switzerland.
Earlier on the opening day Shapovalov went down to Dominic Thiem.
Meanwhile, Greece's Stefanos Tsitsipas easily triumphed over American Taylor Fritz.

AC Milan, Inter complete acquisition of San Siro for new stadium project
Pant returns to India squad for test series against South Africa
Mac Allister heads Liverpool to Champions League win over Real Madrid
Sabalenka overpowers Pegula, Gauff eliminates Paolini in WTA Finals
Pakistan win ODI against South Africa in last over as Salman shows the way
