New York: Emma Navarro, seeded 13th, outclassed Spain’s Paula Badosa in the US Open women’s singles quarterfinals after coming from 5-1 behind in the second set to book spot in her maiden Grand Slam semifinal. Playing in front of her home crowd, Navarro registered a 6-2, 7-5 win after scripting an astonishing comeback in the second set to progress to the last four of the US Open. The result will guarantee her a debut top 10 ranking next week. The 23-year-old American is continuing her breakthrough season which saw her lifting the first WTA Tour title in Hobart in January.