Complex sentence: Over the course of 24 consecutive majors she failed to make it out of the pre-tournament qualifier; the streak ended when she earned a wildcard for the 2014 US Open main draw, which she capitalized on for her first major match win.
Split into simpler sentences: Over the course of 24 consecutive majors she failed to make it out of the pre-tournament qualifier. The streak ended when she earned a wildcard for the 2014 US Open main draw, which she capitalized on for her first major match win.