Katie Boulter beat Australia's Olivia Gadecki in straight sets to ensure Great Britain reached the United Cup quarter-finals in Sydney. Boulter knew a straight-set victory from any of the three rubbers against the hosts would take GB through as Group F winners.

Katie Boulter delivered Great Britain into the the United Cup quarterfinals after defeating Olivia Gadecki in straight-sets in the final Group F tie in Sydney.

Alexander Zverev eased past Thiago Monteiro 6-4, 6-4 as Germany beat Brazil for a winning start to its United Cup defense Sunday.

Alexander Zverev eased past Thiago Monteiro 6-4 6-4 as Germany beat Brazil for a winning start to their United Cup defence on Sunday while the Czech Republic got the better of Norway in a hard-fought match.

Title holders Germany had a winning start into the United Cup when they beat Brazil 3-0 in their opening group tie on Sunday in Perth. Laura Siegemund opened with a hard-earned 6-3, 1-6, 6-4 against Beatriz Haddad Maia and Alexander Zverev clinched the tie before the concluding mixed doubles,

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Germany took a solid first step on Sunday in defence of their United Cup title with world number two Alexander Zverev and Laura Siegemund powering them past Brazil, who were knocked out of the mixed-team tournament.