Prakash Amritraj of Encino, a junior at Harvard-Westlake High, advanced to the singles quarterfinals and doubles semifinals with victories Thursday in the boys' 16 U.S. National Clay Court Tennis Championships at Woodmont Country Club in Rockville, Md.
Amritraj, seeded No. 31, upset No. 16-seeded Derrick Bauer of Marina del Rey, 6-7 (7-1), 7-5, 6-0.
Amritraj and K.C. Corkery of Manhattan Beach defeated Conner Murnighan of Glenview, Ill., and Derrick Spice of North Olmsted, Ohio, 6-3, 7-6 (7-5), in the doubles quarterfinals. Amritraj and Corkery, seeded No. 4, play No. 6-seeded Jeff Kazarian of Rolling Hills and Rylan Rizza of Rancho Palos Verdes today.
Amritraj's cousin, Stephen Amritraj of Calabasas, and Sam Warburg of Sacramento advanced to the other doubles semifinal by default. Lester Cook of Calabasas and Matthew Emery of Lexington, Ky., could not play after Emery suffered a shoulder injury in a singles loss to Warburg.
In boys' 18 doubles, Travis Rettenmaier of Camarillo and Robby Ginepri of Marietta, Ga., advanced to the quarterfinals with a 6-2, 7-6 (7-5) victory over Troy Hahn of Indianapolis and Alstair Jenkin of Boca Raton, Fla. at Louisville Country Club in Louisville, Ky.
In girls' 14 doubles, No. 1-seeded Erica Sauer of Somis and Riza Zalameda of Los Angeles advanced to the round of 16 with a 6-3, 6-3 victory over Anne Perez and Paula Zabala of Miami at the Frank Veltri Tennis Center in Plantation, Fla.
Nina Yaftali of Westlake Village and Robyn Baker of Palm Desert also advanced to the round of 16 with a 7-5, 6-1 victory over Nicole Shabaz of Fairfax, Va., and Alana Van Derworth of Rockville, Md.
In singles, No. 5-seeded Sauer lost to Natalie Frazier of Riverdale, Ga., 6-2, 6-4, in the round of 16.
* Ashley Redlin, an All-City Section pitcher from El Camino Real High, will attend Cal State Northridge and plans to walk on to the softball team.
Redlin, a right-hander, helped the Conquistadores win three City championships in her four-year career. She was 17-3 with a 0.48 earned-run average while helping El Camino Real win the 1999 City title.
Sarah Farnworth, a junior transfer from Utah who batted .339 and had a 19-13 record as a pitcher last season, also will attend Northridge.
* Erin Misaki, a graduate of Hart High, had an assist for the Mission Viejo Elite Mirage in a 1-0 victory over the Milwaukee Kickers in a girls' under-18 game Thursday in the U.S. Youth Soccer National Championships in Orlando, Fla.
The Mirage defeated the New York Piranhas, 4-1, on Tuesday and will advance to the tournament championship game Sunday by virtue of its 2-0 record.
Misaki, a midfielder who was The Times' 1998-99 regional player of the year and will attend Portland, passed to Allyson Marquand for a six-yard goal in the 56th minute.
* Tyler Weed pitched a two-hitter and Shaunt Bedrosian hit his sixth home run of the tournament to help Northridge Little League defeat Canyon Country West, 5-1, in the District 40 championship game for 11- and 12-year-olds Wednesday night.
Northridge advances to the sectional tournament Saturday in Temple City.
* A soccer camp for boys and girls 5-18 will be conducted Monday through Friday at Balboa Park in Encino.
Full- and half-day sessions are available. The camp, sponsored by American Youth Soccer Organization Region 33 and United Kingdom International, will feature professional coaches from England.
Information: Alan Silver, (818) 763-2065.
* The Cal State Northridge volleyball camp is scheduled for Aug. 9-13 at Northridge.
The camp, to be directed by Lian Lu, women's coach at Northridge, is open to beginning and advanced players. Cost is $160 per player.
Information: (818) 677-3221.
* Sessions of the Viewpoint flag football camp will be conducted in the first two weeks of August at the Calabasas school.
The first session, for boys 7-9, is Aug. 2-6. The second session, for boys 10-13, is Aug. 9-13. Instruction lasts from 5:30-7:30 p.m. each day. Cost is $135.
Information: Viewpoint Coach Derek McIntyre, (818) 591-6460.