With its impressive undefeated conference record, Memphis moved up five spots to 20 in the final week of the Associated Press Top 25 basketball poll.
The Tigers also moved up to 17 in the USA Today coaches poll.
Gonzaga is no one-week wonder at No. 1.
The Bulldogs beat Loyola Marymount 66-48 in its first - and so far only - game as the nation's top-ranked team. They will look to win the West Coast Conference title Monday night.
Gonzaga received 54 first-place votes from the 65-member national media panel. Duke, which received the other 11 first-place votes, moved up one spot to second after beating Virginia Tech and North Carolina last week. Indiana dropped one place to third after losing to Ohio State then rallying for the dramatic win at Michigan that gave the Hoosiers the outright Big Ten title.
Louisville jumped from eighth to No. 4 and was followed by Georgetown, Michigan, Kansas, Michigan State, Miami and Ohio State.
The week's lone newcomer is Missouri Valley Conference champion Creighton, which returns after being out of the poll the last four weeks. The Bluejays replace Oregon, which dropped out from 19th after losing two games last week.
The Associated Press contributed to this report.
USA Today Poll
AP Poll others receiving votes: Saint Mary's 117, Butler 105, North Carolina 49, Colorado State 48, Temple 20, Belmont 13, UNLV 7, Wichita State 6, Kentucky 5, Oregon 4, Valparaiso 1, Villanova 1.
USA Today Coaches Poll others receiving votes: Notre Dame 46, North Carolina 30, Butler 24, Colorado State 13, Belmont 9, Middle Tennessee 5, Missouri 4, San Diego State 2, Stephen F. Austin 1, UNLV 1, Wichita State 1, Kentucky 1, California 1
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