It looks like former Bellator middleweight champ Hector Lombard will face a new opponent on August 4 when he makes his UFC debut after news surfaced stating original adversary, Brian Stann, had withdrawn from the bout as the result of an undisclosed injury he suffered while training for the fight. The two were set to serve as the evening’s main event meaning Stann’s status has left the show’s headliner in limbo.

MMAJunkie was first to report the change though nothing official has been announced by the UFC.

Stann is 4-1 as a middleweight including an opening round knockout of Alessio Sakara in his most recent outing. Meanwhile, Lombard holds an overall record of 31-2-1 including an unbeaten stretch spanning more than 20 tilts.

UFC on FOX 4 still features a fight between Ryan Bader-Lyoto Machida, giving the UFC a bit of flexibility in terms of promoting a significant scrap at the top of the card in case a suitable foe for Lombard can’t be found in time. Other match-ups at the event include Phil Davis-Wagner Prado, Cole Miller-Nam Phan, and Travis Browne-Ben Rothwell.