Coaches Rick Pitino and John Calipari supposedly had a "friendly feud." They were old pals with a relationship based on mentorship, trust, and opportunity, but their teams battled each other. Fine. You can be friends and rivals.

But as the two coaches advanced -- from college, to the NBA, and back -- that friendship looked shakier and shakier. Not only did new developments drive Pitino and Calipari to admonish one another publicly, but new reporting suggested their original friendship wasn't as sturdy as it once seemed.

In more recent times, with the pressure diminished, Calipari and Pitino might get along just fine, but back when everyone was comparing the two and trumpeting their companionship ... they might have been enemies.