LUBBOCK, Texas — Darius Johnson had 24 points, Keyshawn Hall scored 22 and UCF upped its win streak to six after holding on for an 87-83 victory against Texas Tech on Tuesday in a Big 12 Conference opener. Johnson made 3 of 4 free throws in the final 19 seconds after the Knights (10-2) saw an 18-point second-half lead shrink to one. UCF used a 24-12 run in the first 10 minutes of the second half to turn an eight-point halftime lead into a 71-53 advantage.