Oxford — Randy St. Germain has coached son Cooper and the rest of the Old Lyme High School baseball team's 10 seniors in a variety of sports since elementary school.

"I've known most of them since they were 2 or 3 years old," St. Germain said Saturday. "Daycare ... then coaching them in the all the different sports. They're just athletic. And they all can play. There's kids I don't play that would be starting on most teams in the Shoreline (Conference)."

No. 24 seed Old Lyme gave the Shoreline three teams in the Class S state tournament semifinals, taking out No. 1 Oxford 4-3 Saturday in the quarterfinal round. Old Lyme (13-11) will play No. 4 St. Paul in the semifinals at 1:30 p.m. Tuesday at New Britain's Beehive Field, while No. 3 Morgan and No. 23 Cromwell, also representing the Shoreline, will face off at 5 p.m.

Will Visgilio pitched a complete game for Old Lyme, which scratched out a run with two outs in the first inning off pitcher Cole Chudoba — previously 9-0 with a 1.84 earned run average — on an RBI single by Alex Bellas to score Callum Sawden, and added a two-run home run by Brett Hartmann in the second.

"Their pitcher was 9-0, so it's not like he was used to losing or being behind at all," St. Germain said. "When Alex singled to score Callum to make it 1-0, that was a big part of the game. I don't think they were used to that."

This same core group of boys also reached the Class S semifinals in boys' soccer this school year, as well as winning the Shoreline Conference tournament.

"It does not surprise me that the Shoreline is well-represented (in baseball)," St. Germain said. "Especially this year, some of the coaches were talking about it was wide open. Oxford (16-4 regular season) still lost four games on the year. It's not like you had that No. 1 team everyone was talking about."

Griffin Powers doubled and drove in a run, Cooper St. Germain had two hits and Sawden doubled for Old Lyme. Visgilio struck out one and walked two.

Oxford finished the season 21-5.

Girls' tennis

• Eastern Connecticut Conference singles champion Gabby Dellacono of Stonington won a pair of matches to advance to the third round of the State Open. Dellacono, a freshman and the No. 13 seed, defeated Hand's Lee Jiaen 8-5 in the first round and Watertown's Ava Kaveraud 8-1 in the second round. She will face No. 4 Amy Zammarieh in Monday's third round at Yale. Zammarieh beat Old Lyme's Emily Brault 8-0 in the first round and Waterford's Alaina Moger 8-0 in the second round.

Moger had advanced with an 8-0 win over East Hampton's Aitana Morales in the first round. St. Bernard's Michaela Abate and Stonington's Charlotte Johnson each won qualifying round matches before falling in the first round. Abate beat Hall's Rebcca Fried 8-0 before losing to New Canaan's Caroline Gordon 8-2, while Johnstone defeated Woodland's Amanda Doughney 8-1 before losing to Glastonbury's Alexandra DeNucci 8-0.

In doubles, Stonington's unseeded team of Brielle Fratoni-Jaskiewicz and Hannah Middleton-Krancberg won three matches to reach the third round. They beat Watertown's Madison Cacciato-Julia D'Occhio 8-2 in the qualifying round, upset seventh-seeded Jessica Coughlin-Nicole Woznyk of Coginchaug 9-8 in the first round, then beat Sacred Heart of Hamden's Aimee Duprey-Ireland Gilmore 8-1 in the second round. Up next is the No. 10 seeded team of Darien's Susan Alptekin-Daphne Gray.

The Bears' ECC championship doubles team of Claire Morehouse-Phoebe Townsend defeated Masuk's Veronica Regina-Madeline Lesko 8-1 in the first round before losing to Darien's Anna Barsanti-Mia Dursht 8-1 in the second round. Fitch's Nina Lupo-Jillian Leger went 1-1, defeating Law's Trisha Bradley-Megan Gleason 8-3 in the first round and losing to Staples' Megan Brown-Kristin Butler 8-1 in the second round. In addition, Waterford's Catherine Yao-Stacey Tasoulas lost to Brown and Butler in the first round while Ledyard's Stephanie Vetrano-Cara Tran lost to Simsbury's Adelaide Demaj-Emma Kyzivat 8-1 in the first round.

Boys' tennis

• St. Bernard's Alex Zuczek and Old Lyme's Brendan White were eliminated in the first round of the State Open at Yale University. Zuczek, a junior, retired to an injury trailing Matt Donahue of Simsbury, 2-0, while White, a senior, was beaten by Nicholas Condos of Wilton, 6-1, 6-0, in his final high school match.

Boys' golf

• Four teams and a pair of individuals have qualified for the CIAC golf tournaments, which will be held Monday and Tuesday throughout the state. In Division III, which will be played Monday at Crestbrook Park in Watertown, Stonington and Montville earned bids. In Division IV, which will be played on Monday at Fairview Farm in Harwinton, Old Lyme and Wheeler earned bids. And in Division I, which will be played on Monday at Tallwood Country Club in Hebron, Norwich Free Academy's Jack Sullivan and Noah Straub qualified as individuals.