Player to watch: Jahlil Okafor (right) has been so good as a freshman, it's easy to understand why Apple Valley's Tyus Jones was so determined to play with him in college. The 6-11, 270-pound Okafor can score at will if he's not double-teamed, which opens everything up for Duke's sharpshooters. If Okafor leaves after one season, he's a strong bet to be the No. 1 pick in the NBA draft.

Best matchup: Iowa has a higher seed than Davidson, but the RPI rankings had the Hawkeyes 43rd and the Wildcats 33rd. Davidson had won 10 straight before Saturday's loss to VCU.

Upset watch: Eastern Washington defeated Indiana at Assembly Hall in November, and Georgetown was a pedestrian 8-10 against teams ranked in the RPI Top 100.