Jaime Jaquez Jr. registered 24 points and eight rebounds to help UCLA post a 68-63 victory over Northwestern on Saturday night in NCAA Tournament West Region play at Sacramento, Calif.Amari Bailey added 14 points and six assists as the second-seeded Bruins (31-5) advance to a third straight Sweet 16 for the first time since the program reached three consecutive Final Fours from 2006-08.Tyger Campbell had seven assists and was 12 of 12 from the free-throw line for all of his points as UCLA won for the 14th time in the past 15 games.The Bruins will face either third-seeded Gonzaga or sixth-seeded TCU on Thursday in Las Vegas.Boo Buie scored 18 points for seventh-seeded Northwestern (22-12), which is 2-2 all-time in NCAA Tournament play. Matt Nicholson scored a career-best 17 points on 7-of-7 shooting and grabbed nine rebounds while Chase Audige scored all 16 of his points in the second half for the Wildcats.Northwestern connected on 37.3 percent of its shots and was 6 of 22 from behind the arc.The Bruins shot 50 percent from the field and were 6 of 15 from 3-point range.The margin was three before UCLA’s David Singleton swished a 3-pointer with 1:52 remaining to give the Bruins a 62-56 edge.Brooks Barnhizer made two free throws with 1:26 left to bring Northwestern within four before Campbell made two free throws with 32.6 seconds remaining. Buie’s basket with 23.3 seconds left again cut the Wildcats’ deficit to four.Singleton was fouled with 20.3 seconds left but injured his lower right leg on the play and was helped to the locker room. Dylan Andrews shot the free throws instead and made both for a six-point margin.Campbell made two free throws with 11.7 seconds left to cap it.