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. Zverev assured the win by dominating Thiago Monteiro 6-4, 6-4 after Siegemund began with a 6-3, 1-6, 6-4 victory over Beatriz Haddad Maia, who is ranked 63 places above her at 17. The result in Perth eliminated the South Americans from group play after a previous loss to China. Germany face the Chinese on Monday with the winner advancing to the quarter-finals. In Sydney, women’s world number four Jasmine Paolini crushed Belinda Bencic 6-1, 6-1 in just 57 minutes to ensure Italy beat Switzerland. Men’s world number six Casper Ruud, meanwhile, survived a tough examination from Tomas Machac, but his efforts were in vain as Norway crashed to the Czech Republic. Zverev broke Monteiro in the opening game of each set, preventing him from threatening in the 80-minute contest. The one-two singles punch left Germany in an unfamiliar position at the tournament it won last year. “This is the first time we’ve ever been up 2-0,” Zverev said. “Last year, I played deciding (mixed doubles) matches every time.