The field is set for the 18s quarterfinals Thursday and Friday with four of the top five seeds advancing.
The fourth seed, Alexander Domijan of Wesley Chapel, Fla., was upset by Rhyne Williams (12) of Knoxville, Tenn., 1-6, 7-6 (6), 7-5 on Wednesday.
Williams said it's a good thing to know that he can rebound from a 6-1 first-set loss to win the match, but "I've got to get out tomorrow and play another one, which is a bad thing."

Top-seeded Ryan Harrison of New Braunfels, Texas, pulled out a three-setter, 4-6, 6-0, 6-3, over Alex Llompart (21) of Carolina, Puerto Rico. Both attend the John Newcombe Academy and "I train with him and practice with him every day," Harrison said. "I warmed up with him today before the match, so obviously there's a little bit of a rivalry there."
"He came out playing well, serving big and got an early break on me ... I wasn’t 100 percent ready to play. I came out a little bit lackadaisical and he was ready to get on top of things and he immediately took advantage. I didn’t even have a break point in the first set."
Harrison will play Bradley Klahn (7) of Poway, Calif., in the quarterfinals. Klahn beat Kyle McMorrow (13), 6-3, 6-2, on Wednesday.

Chase Buchanan (2) of New Albany, Ohio, advanced with a 6-2, 6-1 win over unseeded Ian Chadwell of Franklin, Tenn., and Adam El Mihdawy (3) of Long Island City, N.Y., defeated Wil Spencer (16) of Ponce De Leon, Fla., 6-2, 6-7 (4), 6-2.
"He was missing a lot in the first and I was attacking a little more," El Mihdawy said of Spencer.
In the quarters, Buchanan will play Ryan Thacher (8) of Studio City, Calif., who defeated Jarmere Jenkins (9) of College Park, Ga., 3-6, 6-3, 6-2, in the round of 16.
El Mihdawy takes on Ty Trombetta (6) of Hallandale, Fla., who beat Dennis Nevolo (11) of Gurnee, Ill., 6-3, 6-7 (2), 7-6 (5).

Austin Krajicek (5) of Bryan Texas defeated Steve Johnson (15) of Orange, Calif, 6-4, 3-6, 6-4 and will face Williams in the quarterfinals.

Source: USTA Nationals Staff