INDIANAPOLIS (AP) — The NCAA West Region semifinals pit top-seeded Gonzaga against fifth-seeded Creighton and a Pac-12 showdown between USC and Oregon. Gonzaga needs four more wins to win not only the national championship but the first perfect season in Division I basketball in 45 years. It won’t be easy. Creighton players understand what it will take to knock off the Bulldogs. Both games are on Sunday in Indianapolis.