Purdue basketball's defense has improved significantly, led by its senior players, just in time for March Madness.

There are no outliers this year. No Virginia-style team dragging opponents into the mud with elite defense but limited offense. Instead, the top of college basketball is dominated by complete teams.

UConn men's basketball is chasing its third NCAA Tournament title in four years under Dan Hurley. This time, it will start with the Huskies' defense.