Darius Johnson had 16 points and five assists, Jaylin Sellers scored 15 points and UCF held No. 23 Texas Tech without a field goal for more than nine minutes in the second half en route to a 75-61 victory Saturday. The win, keyed by a 20-3 second-half run, was the third by the Knights (14-12, 5-9 Big 12) over a ranked opponent at Addition Financial Arena in their first season in the Big 12. Johnson led the effort, hitting back-to-back 3-pointers to give the Knights some much-needed breathing room and their first double-digit lead with five minutes to play.