Ty Trombetta (6) of Hallandale, Fla., won his fourth three-setter in a row, advancing to Saturday's semifinals with a 6-7 (3), 7-6 (4), 6-3 win over Adam El Mihdawy (3) of Long Island City, N.Y., today.
Trombetta will play Ryan Thacher (8) of Studio City Calif., in one 18s semifinal.
Ryan Harrison (1) of New Braunfels, Texas, will face Austin Krajicek (5) of Bryan, Texas, in the other 18s semifinal.

Source: USTA Nationals Staff