When it comes to fighters that have been put through the ringer at the very highest level, it's hard to find someone that is more experienced than Robert Whittaker. The former middleweight champion has been facing the very best at 185-pounds for the best part of seven years at this stage in his career.

With 22 Octagon appearances under his belt, there's not much that you can throw at "The Reaper" which he won't have encountered in the past. That being said, his next challenge is somewhat of an enigma.

Despite the fact that he has beaten the likes of Gilbert Burns and Kamaru Usman, one of those wins came when he was fighting at welterweight and his contest with Usman was a close fight that saw the former 170-pound champion step in at middleweight on short notice.

We will truly find out how good Chimaev is when he faces Whittaker who has already proven his level against the majority of the top contenders to come through the division in the last seven years.

In an interview with TalkSPORT MMA ahead of their co-main event clash at UFC 308, Whittaker was asked whether Chimaev is his toughest fight to date after all of the top opposition that he has squared off with.

No, like I’ve fought the best of the best. I think it’s the most pressing test because it’s unwritten and I think there’s a lot of gravity to this fight because it’s the unknown like as of right now but like, I’ve won a lot of hard fights and I’ve lost a lot of hard fights, I’ve been tested.

Right now, it’s obviously Chimaev right because it’s unknown, it’s ground that hasn’t been trodden yet. I respect the task at hand and I’m just looking forward to it.”