Following his dominant win over B.J. Penn at UFC on Fox 5, Rory MacDonald issued a challenge to Carlos Condit. Condit is the only man to have ever defeated MacDonald, winning by stoppage with just seven seconds left to go in the fight back at UFC 115.

Condit, fresh off a loss to welterweight king Georges St. Pierre, quickly accepted the challenge. But fights aren't official until the UFC confirms them. And that's exactly what Dana White did (via MMA Junkie):

MacDonald (14-1 MMA, 5-1 UFC) on Wednesday told MMAjunkie.com Radio (www.mmajunkie.com/radio) he's been granted the rematch with Condit (28-6 MMA, 5-2 UFC), and UFC President Dana White confirmed the booking to MMAjunkie.com (www.mmajunkie.com).

The fight is targeted for March 16 at Bell Centre in Montreal. Though the UFC has not officially announced that show, sources close to the event said it will be UFC 158, a pay-per-view. The placement of the MacDonald-Condit fight was not revealed, though it will be positioned on the main card.

I can't imagine the fight being any lower than the co-main event slot as a MacDonald win may put him in position for a title shot.

It appears that Nick Diaz is next up for GSP, despite Diaz coming off a suspension for marijuana after losing to Carlos Condit in his last fight. Next up after Diaz would appear to be Johny Hendricks. But I wouldn't be shocked if the UFC jumped MacDonald in front of Hendricks should Rory look good and get the win over Condit.