World number one Carlos Alcaraz says he's rested and recharged after his US Open triumph and looking forward to contributing to Team Europe's bid to retain the Laver Cup.

The Spaniard will ease into the competition between Team Europe and Team World when he anchors the Friday night session playing doubles alongside Czech Jakub Mensik against a Team World US duo of Taylor Fritz and Alex Michelsen.

"I have battery enough just to pull off good things here in the Laver Cup," Alcaraz said.

And Team Europe were off to a quick start thanks to victories for Casper Ruud and Mensik in the first two singles matches at Chase Center, home of the NBA's Golden State Warriors.

Norway's Ruud got Europe off the mark with a 6-4, 7-6 (7/4) victory over big-serving American Reilly Opelka.

Ruud claimed his

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