A replacement search is underway after Tony Martin was recently forced off this month’s UFC on FOX 20 fight card.

A UFC official today told MMAjunkie that a neck injury has forced Martin (10-3 MMA, 2-3 UFC) out of the network-televised event. His opponent, Michel Prazeres (19-2 MMA, 3-2 UFC), now awaits a new foe.

UFC on FOX 20 takes place July 23 at Chicago’s United Center. The event airs on FOX following early prelims on UFC Fight Pass, though the bout order hasn’t been finalized.

Martin, 26, looked to build on a recent 2-1 run that included a January submission victory over Felipe Oliveiri. It marked his eighth submission win in 10 career victories since his 2012 pro debut.

Prazeres, a 32-year-old Brazilian, earned a split-decision victory over Valmir Lazaro in November. He’s now 3-1 over his past four fights; the lone loss came via decision to standout Kevin Lee.

The latest UFC on FOX 20 lineup now includes:

Holly Holm vs. Valentina Shevchenko

Edson Barboza vs. Gilbert Melendez

Bojan Mihajlovic vs. Francis Ngannou

Kailin Curran vs. Felice Herrig

Frankie Saenz vs. Eddie Wineland

Darren Elkins vs. Godofredo Pepey

Kamaru Usman vs. Alexander Yakovlev

Michel Prazeres vs. opponent TBA

James Moontasri vs. Alex Oliveira

George Sullivan vs. Hector Urbina

Jim Alers vs. Jason Knight

Luis Henrique vs. Dmitry Smolyakov

For more on UFC on FOX 20, check out the UFC Rumors section of the site.