MADRID, Feb. 7 (Xinhua) -- Francisco Trincao scored a vital winning goal for FC Barcelona to keep their slim title hopes alive with a 3-2 win away to Betis on Sunday night. Leo Messi and Pedri began on the bench for Barca ahead of next week's Copa del Rey semifinal. Although Betis also made changes after their quarterfinal defeat on Thursday, they took the lead thanks to Borja Iglesias' instinctive finish in the second half. Messi and Pedri came on in the 57th minute. Two minutes later he drew Barca level with a trademark left-foot shot before Victor Ruiz was unfortunate to score an own goal after Griezmann's efforts to control the ball rebounded off him and into the net.