Di Lorenzo, a 22-year-old from Ohio, is a past NCAA doubles champion now ranked 128th. Osuigwe, a 17-year-old from Florida, won a French Open junior title and is ranked 105th. Ahn, a 27-year-old from New Jersey, finished first in the USTA’s wild-card challenge, while Volynets, a 17-year-old from California, won the 18s national championship.