Austin Di Giulio was unseeded, but he breezed past Zummy Bauer of Georgia, 6-1, 6-1, to win the boys' 12s title.
Joseph is ranked No. 49 nationally by the United States Tennis Assn. in boys' 16s. He also had to come back to win his quarterfinal match in the tournament, a three-set affair against Logan Staggs of Tracy.
Joseph and his doubles partner, Benjamin Donovan of Tennessee, finished third in boys' 16s doubles at the Mike Agassi tournament.
Austin, ranked No. 12 in Southern California in boys' 12s, did not lose a set in claiming the Las Vegas singles crown. He and his doubles partner, Gavin Spencer of San Juan Capistrano, finished second after they were edged in the final by top-seeded Michael Bautista of Washington and Joe Hardwicke of Oregon, 9-8 (7), in the eight-game pro set format.
—From staff reports
Lions in GSAC Tournament
The Vanguard University men's and women's soccer teams will compete in their respective Golden State Athletic Conference tournaments this week.
The VU men's team (12-6, 6-3 in conference) is the No. 4 seed and plays host to No. 5-seeded Biola (10-5-2, 5-4) in the quarterfinals on Wednesday at 6 p.m.
The VU women's team (12-4-1, 4-4-1) finished sixth in conference. It will visit No. 3-seeded Azusa Pacific (11-2-1, 7-2) in Tuesday's quarterfinal round at 2 p.m.
The Lions men lost to Biola, 2-1, on Saturday.
The Lions women lost to No. 6-ranked APU, 1-0, in overtime on Oct. 18.
Junior Kevin Cornwall leads the VU men with 11 goals and three assists. Kyle O'Brien has eight goals and seven assists.
Senior Gabriela Valles leads the VU women with 11 goals and six assists.
— From staff reports