As she breezed past her quarterfinal and semifinal opponents in straight sets, Maggie Dorr couldn’t stop her mind from wandering back to her run as a sophomore that ended prematurely in the sectional final.

Now a senior at Concord-Carlisle, the Tufts-bound singles tennis player was eager to officially put that loss behind her and solidify her spot as the North’s top player. The top-seeded Dorr did just that Saturday in Lexington, pulling away from the third seed, Acton-Boxborough freshman Ashleigh Parlman, 6-3, 6-1, to capture the North Sectional crown that had eluded her to that point.

“To come back and win it felt really good,’’ Dorr said. “My serve was the biggest factor for me today, and being really aggressive toward her backhand side really got me going.’’

Parlman, who won a three-setter in the quarterfinals and a grind-it-out type match in the semifinals earlier Saturday, made it difficult for Dorr at first.

Their contrast in styles was evident right away. Dorr pounded her first serves and put pressure on Parlman, while Parlman consistently tried to slice the ball back and outlast Dorr with long rallies.

“My dad calls me dirt dog, because I just run everything down,’’ Parlman said. “I’m totally cool with that.’’

This was her first opportunity on the biggest individual high school stage, and for a while she held her own.

In the end, though, Dorr was simply overpowering.

On the last point of the match, Dorr punctuated an 11-shot rally with a forehand winner down the line to seal it.

“This year, she’s really taken her game to another level,’’ longtime Concord-Carlisle coach Bob Furey said.

In doubles, freshman Claire Lee and junior Zoe Golub of Newton South scrapped their way to a 6-1, 6-3 win over Andover’s Annette Kim and Caroline Young to earn a sectional title.

Lee’s forceful strokes and Golub’s crafty play at the net complemented each other perfectly, and they fended off a late rally from Kim and Young.

“It feels amazing,’’ Golub said. “We’ve been working really hard this season, so our work has finally paid off.’’

South sectional — Needham’s Kevin Chao had a successful day, cruising through his semifinal match before beating Wellesley’s Alex Novins in the boys’ sectional final at Newton North High.

The top-seeded Chao defeated the No. 2 seed Novins, 7-6 (7-5), 6-1, to earn a spot in the state semifinals June 16 at St. John’s Shrewsbury.

“It feels great. It’s a new experience for me,’’ said Chao, who’s headed to Sacred Heart University. “I don’t really know how to feel yet. I thought [the final] went really well. I thought the beginning was kind of tight and equal on both sides. Overall, [Novins] played great and I kind of stepped it up after the first set.

“[The tiebreaker] was very huge. I was down, 2-4, in the tiebreaker and was trying to keep myself calm throughout the whole tiebreak and that was what got me through it.’’

Chao was a 6-2, 6-5 winner over fellow top seed Trevor Schwarzmann of Dartmouth in the semifinals.

Novins dealt Hanover’s Nick Ginter a 6-4, 3-0 loss to advance to the final.

In the battle of Brookline doubles, second-seeded Ben Moolman and Kei Ogawa defeated top-seeded Nate Comerchero and Aaron Fleishman, 6-3, 6-3, to punch their ticket to the state finals.

In the doubles semifinals, Newton North’s pairing of fifth-seeded Ben Archer and Nathan Cai fell to Comerchero and Fleishman in a second set tiebreaker, 6-2, 7-6. Moolman and Ogawa defeated third-seeded Will Rosen and Mike Ryan from Wellesley, 6-4, 6-7, 6-3.

“I’m a little nervous,’’ said Chao of the state championship. “But I’m excited. It’s a new experience so I’m just excited.’’

Baseball

Burlington 2, Reading 1 — Junior Matt Tyman went the distance for the host Red Devils (11-7), racking up nine strikeouts and allowing only two hits. Junior Justin Miksenas supplied the walkoff hit that scored sophomore Ryan O'Halloran.

Apponequet 4, Fairhaven 3 — Junior Brady Ouellette supplied 2⅓ hitless innings of relief and also drove in the go-ahead run in the top of the seventh for the Lakers (14-2).

Georgetown 3, Triton 2 — Sophomore righthander Jacob Adamsky allowed two earned runs in a complete-game effort for the Royals (11-6).

North Reading 3, Lynn Classical 2 — Junior Cole Doke earned MVP honors at the 37th Nipper Clancy Tournament, helping the Hornets (13-6) take the final.

Austin Prep 5, Danvers 0 — Junior lefthander Cam Seguin allowed two hits with eight strikeouts over six shutout innings and senior shortstop Logan Bravo drove in three runs for the Cougars (16-1).

Lynnfield 7, Belmont 6 — Senior Cooper Marengi lifted a three-run home run and finished with five RBIs to lift the host Pioneers (15-4). Classmate Nick Torosian came in to close out the game and got the final batter to strike out swinging with the bases loaded.

South Boston 10, Fenway 5 — The Knights qualified for the state tournament for the first time since 2011.

Carver 17, Hull 4 — Senior outfielder Andrew Bumpus hit for the cycle to lead the Crusaders (7-8).

Braintree 9, Hingham 1 — Junior Justin Adams supplied a 2-for-4 effort with three RBIs to help lift the visiting Wamps (9-8).

Boys’ lacrosse

St. Mary’s 7, Newburyport 6 — St. Mary’s Brendan Laundry found the back of the net with 19 seconds left in regulation to send the game into overtime, and Davis Kinne supplied the winner in overtime to qualify the host Spartans (9-8) for a tournament berth.

BC High 18, Malden Catholic 4 — Maverick Woods had two goals with two assists as the Eagles (15-3) opened a 10-0 lead by halftime.

Girls’ lacrosse

Shawsheen 19, Southeastern 3 — Junior Meg Brown netted seven goals and the host Rams advanced to the final of the State Vocational Tournament.

For more highlights, go to bostonglobe.com/schools.