Wladimir Klitschko has gone public in calling out David Haye on Monday in a video message posted online.
Klitschko, the WBO and IBF world heavyweight champion was two weeks away from a fight with the Englishman last summer before Haye was forced to pull out with a back injury.
In the meantime, Haye has gone on to win the WBA belt from Nikolai Valuev and earlier this month made an impressive first defence of the title against veteran John Ruiz.
Klitschko has also fought twice, beating Haye's stand-in Ruslan Chagaev and American Eddie Chambers in routine title defences.
However, the pair remain on collision course with Haye desperate to cement his legacy with fight against Klitschko, and/or his brother Vitali, the WBC champion.
But it seems Klitschko is just as keen to take on a meaningful opponent after countless title defences against inferior opposition.
"I want to send this message to boxing fans and directly to David Haye," he says in the video. "David, you've bitched out on fighting both Klitschko brothers twice already and now is the time to make it happen.
"On behalf of the boxing fans around the world, I am officially calling you out to fight me.
"You can't run away from me forever and you need to follow through with this fight to get respect. I'm ready. What are you waiting for?"
Haye said after beating Ruiz that negotiations between he and the Klitschkos were due to take place 'in the coming weeks'.