Moments after the UFC had put pen to paper and inked Donald Cerrone vs. Khabib Nurmagomedov, the bout was scrapped.

During his scrum in Ireland, UFC president Dana White confirmed that the promotion had signed Cerrone-Nurmagomedov for a future card in a battle of lightweight contenders.

“Twenty minutes (after signing the fight, Nurmagomedov) went into the gym and blew out his knee,” White said. “Twenty minutes later. It was done. The bout agreements were done. (Now) this fight is off.”

Nurmagomedov, unbeaten in his MMA career, posted a picture of his right leg on Twitter, along with the comment, “I hurt my knee, maybe need surgery.”

Cerrone is coming off a fourth straight win, finishing Jim Miller in the second round.