Chase Rados of Newport Beach lost to Trevor Brown of San Diego, 6-0, 6-3.
Corona del Mar resident Henry Gordon lost to Robert Simon of Paradise Valley, Ariz., 6-0, 6-2.
Troy Arnold of Newport Harbor High lost to Blaine Mengert of Orange, 6-2, 6-2.
In the boys' 18 singles, Andrew Kurzweil of Sage Hill School advanced to today's round of 16 after Quentin Moscaritolo was a no-show. Kurzweil will play against No. 4 seed Brandon Schlack of Long Beach at 10:30 a.m.
Newport Beach resident Miles Patricola advanced to today's round of 16 after his opponent Jimmy Fernandez of Orange withdrew because of injury. Patricola will play against Joseph Park of Cerritos, 6-2, 6-4. Park upset the No. 5 seed, Gerrit Dickey of Temecula, 6-2, 6-2.
Eric Miller of San Diego defeated Costa Mesa's Alexander Adams, 6-2, 6-2.
Newport Beach resident Alex Carlis lost to No. 2 seed Patrick Lipscomb, 6-0, 6-0.
Paul McKelvey of Newport Beach lost to Matthew Chung of Orange, 6-0, 6-0.
In the boys' 12 singles, Bjorn Hoffmann of Newport Beach defeated Alvaro Gonzalez of Guadalajara, Jalisco, 6-0, 6-0, to advance to today's round of 16. Hoffmann will play against Zu Zinyang Tan at 11:30 a.m.
Adam Langevin of Newport Beach lost to No. 4 seed Nicholas Appel, 6-3, 6-1.
In girls' 16 singles, No. 8 seed Morgan McVey of Newport Beach advanced to today's round of 16 with a 7-5, 6-2 victory over Bridget Etchegaray of Yorba Linda. McVey will play against Sabine Ludwig of Capistrano Beach at 1:30 p.m.
Newport Beach resident Olivia Dajee advanced to today's round of 16 after beating Casey Astorino of Sage Hill School, 6-2, 6-1. Dajee will play against No. 6 seed Camille Deleon of La Mirada at 2 p.m.