The Ultimate Fighter 18 hasn't even premiered yet and has already undergone a significant change. Miesha Tate will now coach this upcoming season opposite Ronda Rousey with Cat Zingano injured. Kevin Iole of Yahoo has the breaking news:

Unbeaten Cat Zingano, who was slated to coach opposite women's bantamweight champion Ronda Rousey, injured a knee and was replaced as coach by long-time Rousey rival Miesha Tate.

Rousey did not know that Zingano was injured - UFC president Dana White said it had been a tightly kept company secret since Zingano injured her right knee during a May 16 workout - or that Tate had been brought in to replace her, until the opening scenes of the show were filmed on Tuesday.

When Tate came out, Rousey was clearly stunned and she stormed out of the UFC training center, searching for White. She later said she was angry because she thought Tate was replacing her.

The injury is serious enough that Zingano, who defeated Tate by 3rd round TKO at The Ultimate Fighter 17 Finale, also loses her title shot.

The coaching slot and title shot - tentatively slated to be on pay-per-view on Dec. 28 - now goes to Tate.

This is obviously major news not just for TUF but for the immediate future of the new UFC women's bantamweight division. Zingano loses both her coaching spot and title shot despite beating Tate, and Tate's fight with Liz Carmouche at UFC on Fox 8 is obviously off the table.

Bloody Elbow will provide more updates on this developing story as more information becomes available. At 8:05 PM ET Kevin Iole will join Bloody Elbow radio to discuss the breaking news.