Jessica Pula pulled off a stunning upset defeating world no one IG swch 6-2 6 to4 in the US Open quarterfinals this marks pula's first time advancing to a grand slam semi-final after six previous quarterfinal losses pula's strong defense and swch serving struggles including 41 unforced errors were key to the victory pula's win guarantees multiple American players in the semi-final for the first time since 2003 she will face kolina muchova next Pula is the first American woman to be the world known one at a major since 2021