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.

Mexico bounce Czechs out of World Cup with win
South Africa beat South Korea to reach World Cup knockout stage for first time
Qatar’s Assim Madibo gets 5-game ban for injuring Canada's Ismael Kone
Morocco earn comeback win over Haiti to reach last 32
Brazil heads into World Cup knockouts with win over Scotland
