Two Northern Californians will meet in today's semifinals at the $10,000 Claremont USTA Pro Classic in Claremont, Calif.
Collin Altamirano, a sophomore at reigning NCAA champion Virginia from Sacramento, whipped fifth-seeded Daniel Garza of Mexico 6-2, 6-0 on Friday.
McDonald, a junior All-American at UCLA from Piedmont, defeated qualifier Tom Fawcett, a sophomore at Pacific-12 Conference rival Stanford, 6-2, 6-4.
Altamirano beat McDonald 3-6, 6-4, 6-3 in the boys round of 16 at the 2013 U.S. Open in their only career meeting.
In the other semifinal, second-seeded Deiton Baughman, 19, of Carson, Calif., will play former Pepperdine All-American Sebastian Fanselow of Germany.