Elena Rybakina’s Kazakhstan dumped defending champions Germany out of the United Cup on Wednesday with world number two Alexander Zverev sidelined by an arm injury barely a week away from the Australian Open. 

The upset in Perth sent the Kazakhs into the semi-finals of the 18-nation tournament. In Sydney, women’s World No. 2 Iga Swiatek led Poland into the last eight by winning a rematch of her 2023 French Open final against the Czech Republic’s Karolina Muchova.