The Stanford club girls 18U water polo team opened the USAWP National Junior Olympics with a pair of victories in the championship division.
Top-seeded Stanford beat Ripon 20-8 and Royal Black 10-4 at Foothill High in Orange County on Thursday and will play Newport Beach at 8 a.m. Friday at Westminster High.
The 18s will also meet Set Gray in group play later in the day, also at Westminster at 3 p.m.
No. 9 Set Gray and No. 8 Newport Beach each won both of their opening day matches.
In the 16U Championship Division, both Stanford and Mayfield 650 (based in Palo Alto) went 2-1 on the first day of action.
Stanford, seeded No. 27, beat No. 22 Big Valley 9-3 before losing to San Diego Shores A 11-6 at Servite High.
The 16s remained in contention for the title by defeating Diablo Alliance B 17-3 at Portola High.
Stanford plays Friday at Golden West College against No. 36 Riverside A at noon and No. 19 SoCal Gold B at 3:20 p.m.
Mayfield 650, seeded 29th, knocked off No. 20 San Diego Shores B 12-3 in its first game at Portola before falling to No. 5 SB Premier 14-12.
Mayfield came back to beat Shaq A 10-3 and remain in title contention.
The 650 continues at Golden West on Friday with games against No. 12 Diablo Alliance Red A (9:30 a.m.) and No. 19 SB 805 B (4:10 p.m.).
In the 14U Championship Division, Stanford took two of three on the first day at Capistrano Valley High. No. 18 Stanford started with a 13-1 victory over Santa Clara and then lost to Diablo Alliance A 19-2.
The 14s came back to beat La Jolla 14-5 and remain in the upper echelon of the division.
No. 47 Mayfield 650 suffered a pair of defeats on the first day at Beckman High, dropping a 22-0 decision to second-seeded North Irvine Black A and a 15-4 decision to Trojan.
Mayfield travels to Capistrano Valley High for a pair of group games Friday against Praetorian at 11:10 a.m. and Santa Clara at 2:30 p.m.
In the 12U Championship Division, Stanford went 1-2 on the first day at Trabuco Hills High, losing to Laguna Beach 22-3 and Santa Cruz Waxem 19-3 and beating Newport Beach B 11-4.
Stanford continues at Trabuco Hills on Friday with games against SC Tritons at 1 p.m. and against CDM at 4:20 p.m.
In the 10U Championship Division, Stanford beat Lamorinda B 13-4 but lost to Diablo Alliance Red A 15-1 at El Toro High.
Stanford travels to Laguna Hills for a pair of games Friday against Tustin Patriot at 10:40 a.m. and Newport Beach at 2:50 p.m.
Mayfield 650 also has a team entered in the 16U Classic Division. In games played at Villa Park High, 650 B beat American River 7-4 and then lost to South Coast 14-2.
Mayfield continues Friday at El Segundo Aquatic Center with games against Gold Coast at 8 a.m. and Southern at 2:40 p.m.