Ohio State and Kansas are 1-2 in The Associated Press college basketball poll for a second straight week.
The Big Ten champion Buckeyes are No. 1 for a fifth week overall and haven't been ranked lower than second since December. They received 52 first-place votes from the 65-member national media panel Monday.
Kansas was No. 1 on the other ballots.
Pittsburgh moved up one spot to third and was followed by Notre Dame, Duke, North Carolina, San Diego State, BYU, Purdue and Texas.
The No. 4 ranking is Notre Dame's highest since being fourth in December 1980.
West Virginia and Cincinnati are among four newcomers this week and are part of a record nine Big East teams in the Top 25. The Big East had nine teams in for one week in January 2009 and for one week this January.