兹维列夫击败穆勒，继续冲击大满贯

兹维列夫在美网第二轮比赛中战胜亚历山大·穆勒，继续冲击首个大满贯冠军。

Original Title: Zverev continues Slam bid with win over Muller
Article Content:
Alexander Zverev continues his search for a first Grand Slam title with victory over Alexandre Muller to reach the US Open third round.

Original article: https://www.bbc.com/sport/tennis/articles/c2dg7ypwx5ro