​Just a few hours before we were all set for fight night, ​UFC fans got some devastating news.

Set to fight Kelvin Gastelum Saturday night, Robert Whittaker will instead remain on the sidelines at UFC 234. He's out with an abdominal injury.

​​No big deal. That's just one main event ruined. Great. Cool.

Whittaker's supposedly dealing with a hernia, and his health will deny us a chance to watch him defend his ​UFC Middleweight title. He entered as a heavy -220 favorite, and his bout with Gastelum would've capped off the evening's entertainment, likely starting just after midnight (the show begins at 10:00 pm EST).

This would've been Whittaker's first official defense of his title; his bout with Yoel Romero at UFC 225 was downgraded to a non-title affair when Romero failed to make weight.

Fans around the world will have to continue to wait, and this rumble in Melbourne, Australia just got downgraded itself.