Tokito Oda and Yui Kamiji top seeds in US Open wheelchair tournaments

Top-ranked Tokito Oda aims for a calendar year Grand Slam as he leads the men's singles field at the U.S. Open wheelchair tournament. Yui Kamiji, who is the first Japanese woman to achieve a career Grand Slam, is the top seed in women's singles. The U.S. Tennis Association revealed the 16-player entries for men's and women's singles, along with quad singles, while also organizing eight-team doubles competitions. Oda, 20, won last year's title and has secured all major tournaments this year. Kamiji recently defeated Diede de Groot at Wimbledon, now seeded second in New York, who is vying for her seventh U.S. Open singles trophy. Niels Vink of the Netherlands leads the quad division, looking to enhance his sweep of this year's Grand Slam titles.

• 12:34 AMYahoo Sports — Tokito Oda and Yui Kamiji are the top seeds in the US Open wheelchair tournaments