Alexander Zverev Withdraws from United Cup

World No. 2 Alexander Zverev has withdrawn from the United Cup due to a bicep strain, significantly impacting Germany's chances of defending their title as they face Kazakhstan. Zverev was originally set to compete against Alexander Shevchenko after a strong start to the tournament, where he won his initial matches. His withdrawal occurred just before the match, leaving Daniel Masur to step in against Shevchenko, who had already secured a victory for Kazakhstan. Meanwhile, Kazakhstan's Elena Rybakina dominated Laura Siegemund, putting her team in a strong position. The seriousness of Zverev's injury remains unclear as the Australian Open approaches on January 12. In other matches, Iga Swiatek led Poland to victory over the Czech Republic, keeping her team in the tournament.