Sandro Mamukelashvili scored 20 points and came up with a clutch block in overtime as fifth-seeded Seton Hall outlasted fourth-seeded St. John's for a 77-69 victory Thursday afternoon in the quarterfinals of the Big East tournament at Madison Square Garden.

The Pirates (14-12) advanced to face eighth-seeded Georgetown in the semifinals on Friday by making enough plays in overtime when they outscored St. John's 15-7.

Jared Rhoden added 19 points and a career-high 16 rebounds to help Seton Hall reach the semifinals for the fifth time in seven years. Myles Cale contributed 16 points and eight rebounds for the Pirates, who shot 41.7 percent overall and hit nine of their 12 free throws in the extra period.

Julian Champagnie scored 16 points but shot 7 of 21 from the floor for St. John's (16-11), which may have hurt its chances at an NCAA bid by shooting 32.9 percent and missing seven of nine shots in overtime.

Rasheem Dunn added 15 points while Greg Williams Jr. and Marcellus Earlington contributed 12 apiece for the Red Storm.

Mamukelashvili added 11 rebounds and four assists while shooting 7 of 20 from the field. He missed his final seven shots -- including two jumpers in the final six seconds of regulation -- but came up with two clutch plays to help Seton Hall survive.

The Pirates held a 68-64 lead when Mamukelashvili blocked a corner 3-pointer try by Marcellus Earlington with 2:12 left. After Rhoden grabbed the rebound, he connected with Cale on a layup that made it 70-64 with 1:47 remaining.

Seton Hall held a 60-57 lead on a free throw by Mamukelashvili with 2:20 remaining in regulation, but Earlington's open 3-pointer forged a 60-60 tie 20 seconds later. After Dunn hit two free throws with 66 seconds left for a 62-60 edge, Cale tied it on a layup with 54 seconds left and Mamukelashvili missed two jumpers in the lane during the final six seconds to force overtime.

Seton Hall took a 31-22 lead on a layup by Mamukelashvili with 5:36 remaining in the first half but St. John's countered with a 10-0 run before Seton Hall took a 33-32 lead on a dunk by Ike Obiagu with 19 seconds remaining

The half ended when Dunn missed a 3-pointer at the buzzer.

--Field Level Media