Rob McCracken, head trainer for WBO, IBF, IBO, WBA heavyweight champion Anthony Joshua, says a unification with WBC champion Tyson Fury is something that needs to happen in the sport.
Fury capture the WBC world title last Saturday night, when he stopped Deontay Wilder in seven rounds at the MGM Grand in Las Vegas.
Back in December, Joshua flew to Saudi Arabia to reclaim his titles with a dominant decision over Andy Ruiz in their rematch.
At the moment Joshua is gearing up to face IBF mandatory challenger Kubrat Pulev in June.
And Fury is likely heading to a trilogy fight with Wilder, who intends to exercise an immediate rematch clause.
Provided both win, a showdown between Joshua and Fury could happen at the end of the year.
"It has to happen," McCracken told Sky Sports. "It will be fantastic when they box each other - and they will do, down the line. The best fighting the best is what the world wants to see and, certainly, they are the two best heavyweights in the world right now.
"Without a doubt it is fascinating, it is brilliant. We have two heavyweight champions ruling the world - when could you ever say that, in my lifetime? You never could. Big Josh and Tyson have done fantastically well. They are tremendous fighters. What they have achieved is remarkable, in their lives and their sporting careers. It is fantastic for Britain."
Joshua's promoter, Eddie Hearn, is hoping to get that fight done by year's end and he believes all of the network hurdles can be overcome.