Veronica Burton and Sayawni Lassiter have had a friendly rivalry since the fourth grade. They have played as teammates and against each other for as long as they can remember, but Thursday’s Division 1 South basketball quarterfinal matchup was one they’ll never forget.

Newton South’s Burton, a junior, registered a double-double with 29 points and 14 rebounds as the sixth-seeded Lions knocked off third-seeded Newton North, 59-45.

While Lassiter, a senior who is committed to play at Florida State, led all scorers with 31 points, the host Tigers (18-3) could not overcome the continuous perimeter pressure of the Lions (17-4).

“We used to play with each other on the same team in fourth and fifth grade, so it was fun every year,’’ said Burton, who has received several Division 1 offers already. “[Lassiter is] one of the best competitors that we play each season. It’s just a lot of fun playing against her.’’

Newton South came out with an up-tempo offense unafraid to make mistakes, taking a 12-9 advantage after the first quarter.

Burton began to heat up with a 15-point second quarter, but Lassiter — who netted her 1,000th career point in the game — kept the Tigers within striking distance. They trailed, 28-24, at the half.

But the Lions’ 3-point prowess continued, as seniors Sarah King (11 points) and Zoe Foster (6 points) and sophomore Frankie Silva (9 points) all shot well from beyond the arc.

“Everyone on the team has the green light to shoot the three because everyone can make it,’’ said Burton. “I think everyone being able to do that is so hard to stop defensively. That’s what really gives us energy and gives us confidence having that green light.’’

The Lions cruised down the stretch behind Burton’s smooth ballhandling and Newton South’s relentless offensive pressure.

“South is usually the underdogs of the two schools,’’ said Burton. “So it definitely lifted our spirits as a school.’’

The Lions will play the winner of Saturday’s quarterfinal between second-seeded Bishop Feehan and seventh-seeded Braintree.

Division 1 South

Wellesley 45, Marshfield 32 — Junior Kelcie Zarle led the way with 18 points to set up the Raiders (18-3) with a semifinal matchup against Mansfield.

Mansfield 33, Attleborough 31 — Senior captain Jen Peel tallied 14 points and six assists to lead the top-seeded Hornets (19-2).

Division 3 North

Bishop Fenwick 46, Saugus 33 — Sophomore Jaxson Nadeau and senior Sam Mancinelli combined for 33 points to lead the Crusaders (15-8) to a first-round victory.

Amesbury 48, North Reading 34 — Senior guards Madison Napoli and Abby Sartori combined for 30 points for the Indians (20-1).

Boys’ basketball

Division 2 North

Arlington 84, Burlington 64 — Senior guard Colin McNamara scored 25 points for the Spy Ponders (20-1), who will take on New Mission in the sectional quarterfinals.

Division 3 South

Bourne 63, Rockland 48 — Senior captain Jacob Ashwood had 26 points to lead the Canalmen (17-6).

Norwell 68, Dennis-Yarmouth 42 — The Clippers (18-3) were paced by senior guard Jared Browne, who led all scorers with 17 points in the victory.

Burke 58, Apponequet 57 — Senior Dajour Dunkley led the way for the Bulldogs with 17 points in the win, while teammate Levar Williams chipped in with 16.

Division 4 North

St. Mary’s 68, Winthrop 52 — Senior Donny Mercado poured in 29 points to lead the Spartans (16-5) to a semifinal berth.

Division 4 South

South Shore Christian 61, Diman 55 — South Shore (16-5) outscored Diman (11-8) in the third, 16-6, and senior Luke Dagley had a terrific performance with 33 points.

Cohasset 84, Bristol-Plymouth 62 — Junior center Chase Bomeisler and sophomore guard Thatcher Stone combined for 52 points for the Skippers (16-5).

Southeastern 71, Blue Hills 54 — Senior Dante Madero tallied 21 points as the Hawks knocked off top-seeded Blue Hills. Classmates Keith Bobst and Dan Long pitched in with 19 and 16 points, respectively, in the win.

Division 1 Central

Franklin 59, Acton-Boxborough 54 — Jalen Samuels and Paul Mahon scored 19 and 12 points, respectively, to pace the Panthers (19-4).

Boys’ hockey

Division 1 South

Framingham 4, Bridgewater-Raynham 1 — Senior Scott Swennes netted a pair of goals for the Flyers, who will face the winner of Franklin and Brockton in the sectional quarterfinals.

For more highlights, go to bostonglobe.com/schools. To report scores, call 617-929-2860/3235 or email hssports@globe.com.