Junior guard Allison Cunningham hit seven foul shots in the final four minutes as the seventh-seeded Yachtsmen (12-7) completed an upset against the second-seeded Rams Kennebunk in a Class A South quarterfinal at the Portland Expo.

Falmouth took a 13-1 lead in the first quarter and never lost it, although Kennebunk made it close a couple times. Falmouth will play third-seeded Marshwood in the semifinals at 2 p.m. Wednesday. It’s the Yachtsmen’s first trip to the regional semifinals since 2009.

Freshman Anna Turgeon led Falmouth with 18 points, including a buzzer-beating 3-pointer to end the second quarter and send Falmouth into the half leading 19-14. Cunningham followed with 11 points, including eight foul shots in the fourth quarter.

Kennebunk was led by Emily Archibald with 26 points.

The Rams pulled within three late in the third quarter, but Falmouth ran off the next seven points, aided by a Turgeon 3-pointer, to lead 33-23 going into the fourth. Kennebunk got no closer than seven after that.