World No. 1 Yui Kamiji earned her third Grand Slam title of the season by winning the women's singles final at the U.S. Open wheelchair championships on Sunday.The top-seeded Japanese beat the second-seeded Diede de Groot of the Netherlands 7-5, 6-2 in the 1-hour, 11-minute match at the Billie Jean King National Tennis Center to be crowned U.S. Open champion for the second time following her victory in 2014.The 23-year-old Kamiji, who made a semifinal exit from Wimbledon in July which de Groot went on to win, also claimed the singles titles at the Australian Open in January and French Open …READ FULL ARTICLE