Twitter went ablaze as soon as the news hit of that big cancelled bout at UFC 187.  Frustrated fans who are looking for answers, and fighters are talking trash.

And no, not about Jon Jones, who has been suspended indefinitely and will not appear at the May 23 event in Las Vegas.

It’s another one.

Due to an injury, Khabib “The Eagle” Nurmagomedov has pulled out of his bout with Donald “Cowboy” Cerrone on the show, John Morgan of MMA Junkie reported yesterday. Morgan cited “an anonymous source close to the fighter” who “spoke on condition of anonymity.”

News of the knee injury was confirmed by Karyn White on UFC Tonight, who noted that Nurmagomedov is to see a physician today; and the bout still has not been officially cancelled.

“This may be something that could be remedied,” White said. But she didn’t sound confident.

Nurmagomedov, who is 22-0 in his MMA career (and 6-0 in the UFC) has been engaging in a war of words with Cerrone (27-6 in MMA, 14-3 in UFC), along with, seemingly, the rest of the division.

In one broken English interview on the MMA Hour, the native of Dagastan (in the former Soviet Union) described Cerrone as a “fake cowboy.” Nurmagomedov, also implied that then-champion Anthony Pettis was refusing to fight him.

News of the injury saw a response from Pettis to Nurmagomedov:

The winner of the bout between Cerrone and Nurmagomedov was expected to receive a title shot at UFC lightweight champion Rafael dos Anjos. But, unfortunately for “The Eagle,” that’s once again all up in the air now.