CONWAY, S.C. -- Keon Johnson scored 15 points as fourth-seeded Winthrop beat defending tournament champion Liberty 77-65 to open the Big South Conference tournament on Wednesday.

Keon Moore, Andre Smith and Joab Jerome had 14 apiece for Winthrop (18-12). The Eagles made all 21 of their free throws and hit 8 of 22 from 3-point range. Jerome made all nine of his free throws, Johnson made three 3-pointers and Moore had eight rebounds.

Andrew Smith led No. 5 seed Liberty (11-21) with 17 points and Joe Retic added 15. The Flames were up by as many as 12 in the first half.

The game was knotted at 51 with 7:52 left. Then Johnson hit back-to-back 3-pointers to start a 10-2 run to pull away. Moore's free throws at the 1:33 mark gave Winthrop its first double-digit lead of the game.

Winthrop moves on to play top-seeded High Point in the quarterfinals on Friday.