Promoter Kalle Sauerland, who represents heavyweight contender Filip Hrgovic, wants the IBF to throw down the hammer at their top contenders - because top rated fighters are refusing to take part in a final world title eliminator with Hrgovic.

The current IBF world champion is Oleksandr Usyk, who faces Anthony Joshua in a rematch in the coming months.

A few months ago, the sanctioning body ordered a fight between Hrgovic and Michael Hunter, but the contest never came together.

The IBF would recently order Luis Ortiz to face Hrgovic in a final eliminator. The Cuban boxer was unable to participate due to a hand injury.

Then, they ordered former WBO champion Joseph Parker, ranked third, to face Hrgovic - and Parker took a pass on that fight.

"We weren't given a reason," Sauerland told Sky Sports.

"The rankings become a mockery. We have gone through the rankings before. This isn't about rejecting financial terms because fighters are rejecting us before we even discuss that. They are rejecting an opportunity to fight for the world title.

"All we can do is lobby the IBF to continue through the rankings as soon as possible or make Filip a direct mandatory. That is something we are pushing. The IBF need to act because it makes a mockery of their rankings. People should not be ranked if they have no intention of boxing for the title."

There was even some talk about facing Olympic silver medal winner Joe Joyce. However, Joyce is already in line to get a crack at the WBO title, which is also currently held by Usyk.

"Joyce has other plans as [he is] highly rated elsewhere. Nothing but respect for Joe and it's a great fight. Joe beat Filip nine years ago in the [amateurs] - so they know each other," Sauerland said.