Zheng Qinwen suffers a significant loss as the Chinese team advances to the United Cup quarter-finals and prepares to face the American team. On December 31st, Beijing time, during the second round of the women's singles group stage at the United Cup, Gao Xinyu defeated Siegemund 2-1, securing a crucial point for the Chinese team. With this victory, the Chinese team has not only secured a spot in the top eight but also achieved their second consecutive year of reaching the quarter-finals. Their upcoming opponents in the quarter-finals will be the American team led by Gauff. This turn of events is particularly impactful for Zheng Qinwen, who withdrew from this year's United Cup, as it may affect her preparations for the upcoming Australian Open. Initially, Zheng Qinwen was slated to be the number one women's singles player for the Chinese team at the United Cup. However, after her withdrawal, the team did not choose the experienced Zhang Shuai to replace her; instead, the opportunity fell to Gao Xinyu. In her first match, Gao Xinyu played through an injury and managed to reverse a 2-1 score against Brazilian player Maya. In the second match against the German team, Gao Xinyu demonstrated increasing prowess, winning the first set with a score of 6-1. In the decisive set, she firmly controlled her service game, ultimately defeating her opponent with scores of 6-3 and a total of 2-1, directly propelling the Chinese team into the top eight. Gao Xinyu's remarkable performance has drawn comparisons from many fans to Wang Xinyu, who previously replaced Zheng…