Frenemies Bryant, Norman tweet at each other ahead of head-to-head battle

Dez Bryant and Josh Norman are set to renew their rivalry in Sunday's division battle between the Dallas Cowboys and Washington Redskins.

But rather than wait for their afternoon date, the foes took to Twitter to see if the other is up to the task.

The rivalry appears to have dulled since the two featured in phone ads this summer.

Their back-and-forth appears to be just an extension of their marketing campaign.