Stefan Struve needs a new heavyweight opponent for next month’s UFC 204 event.

Struve’s (27-8 MMA, 11-6 UFC) original opponent, Ruslan Magomedov (14-1 MMA, 3-0 UFC), has been sidelined with a staph infection, a UFC official confirmed with MMAjunkie. A time table for his recovery wasn’t immediately known.

A replacement search is underway.

UFC 204 takes place Oct. 8 at Manchester Arena in Manchester, England. The main card airs on pay-per-view following prelims on FS1 and UFC Fight Pass.

Struve and Magomedov, who both are looking to break into the top 15 of the USA TODAY Sports/MMAjunkie MMA heavyweight rankings, were expected to be part of the main card.

Magomedov, a 29-year-old Russian, hasn’t fought since an October 2015 decision victory over Shawn Jordan. It pushed his current winning streak to nine.

Struve, meanwhile, scored a 16-second “Performance of the Night” knockout victory over Antonio Silva in May. The 28-year-old Dutchman was stuck in a 1-3 skid before the quick victory.

The latest UFC 204 card includes:

Champ Michael Bisping vs. Dan Henderson – for middleweight title

Vitor Belfort vs. Gegard Mousasi

Jimi Manuwa vs. Ovince Saint Preux

Stefan Struve vs. TBA

Arnold Allen vs. Mirsad Bektic

Iuri Alcantara vs. Brad Pickett

Ian Entwistle vs. Rob Font

Davey Grant vs. Damian Stasiak

Leon Edwards vs. Albert Tumenov

Mike Perry vs. Danny Roberts

Adriano Martins vs. Leonardo Santos

Marc Diakiese vs. Reza Madadi

For more on UFC 204, check out the UFC Rumors section of the card.