The new USA Network series Common Law, premiering tomorrow night, centers around two cops, played by Michael Ealy and Warren Kole, who despise each other so much that their captain sends them to couples therapy. Of course, when it comes to sports, everyone not getting along doesn't always spell disaster, and titles have been won by dudes who hated each other.

Nonetheless, harmony is something to strive for, so we herewith present ten pairs of sports stars—players, coaches, and even an owner—whose lives could have been improved by a little time on the couch.