[Music] the US Open quarterfinal between Francis tifo and Gregor demitro took an unexpected twist demitro trailing 63 7-6 6341 had to retire due to an injury this allowed TFO to Advanced to his second major semifinal but it wasn't all serious in the second set a rogue bug brought the match to a halt ball boys chased the little Intruder giving everyone a good laugh Tif who had mixed feelings about advancing this way now faces fellow American Taylor Fritz Fritz who fought hard against Alexander zov claimed his spot in the semis in a thrilling 7-6 3-6 6-4 76 Victory this sets up an All-American semifinal guaranteeing a US men's finalist for the first time since 2006 tennis fans get ready for an