Postseason basketball was back in a big way at Brunswick School’s Dann Gymnasium after a one-season hiatus, as the Bruins hosted Greenwich Country Day School in the quarterfinal-round of the FAA Tournament Thursday afternoon.

A playoff atmosphere, indeed, existed at Brunswick, with both team’s fans turning out in large numbers to support their school’s basketball squad.

The Bruins jumped out to a double-digit lead, saw the Tigers close to within three points at halftime, then regained the momentum in the second half.

All of that resulted in a 56-37 win FAA quarterfinal win for top-seeded Brunswick against fourth-seeded, visiting Greenwich Country Day. The win propelled the Bruins into the championship game of the FAA Tournament, which takes place Saturday at 5:30 p.m. at Brunswick’s Dann Gymnasium.

Senior guard/captain Tristan Joseph scored a game-high 19 points, while junior 6-foot-10 center Jonathan Sigurddson poured in 17 points to power the Bruins (12-8, 8-1 in the FAA).

Greenwich Country Day, which put forth a fine showing in its first full season as a varsity team, received 12 points from guard Vaughn Shannonhouse and nine from guard Reggie Grodin.

Both teams had trouble scoring the game’s first points, but the Bruins broke out to a 6-0 lead on a pair of baskets by Joseph and a putback from Sigurddson. A 3-pointer by Shannonhouse cut the Bruins’ lead in half, then Brunswick went on a 10-2 run to open a 16-5 advantage.

Senior guard Charlie Johnson and Joseph converted layups, as did senior forward Luke Michalik during the Bruins’ spurt. Junior guard Malik Samms swished a 3-pointer from the top of the key and Sigurddson scored off an impressive dunk, putting the home team on top, 21-8 late in the opening half.

The Tigers ended the first half with a flurry though, behind stellar perimeter shooting. Grodin converted two 3-pointers and Shannonhouse nailed a shot from beyond the arc, bringing the visitors to within 23-20 at halftime.

Brunswick opened up a sizeable lead in the second half on their way to their semifinal-round triumph. Joseph had 10 second-half points, while Sigurddson totaled 13 of his 17 points in the second half, enabling the Bruins to pull away for the win.

Up next for Brunswick is another matchup against St. Luke’s School, this time for the FAA Tournament championship. The Bruins dropped a 63-54 decision to St. Luke’s at home on Jan. 12, then defeated the Storm on the road on Feb. 14, 62-54.