Wladimir Klitschko holds three of the four major titles ( WBA, IBF and WBO ) apart of the Ring Magazine universal recognition as world heavyweight champion. The WBC belt once held by his bro, Vitali who has retired undefeated as titlist to run for mayor of Kiev in Ukraine, is now held by Bermane Stiverne. But Wladdy is up for a stern challenge from Bulgarian Pulev. before the year ends and could lose his belts.

Wladimir Klitschko holding the WBA, IBF and WBO heavyweight titles

and

Bermaine Stiverne holding the WBC heavyweight title.

Whlad would have to lose, for it to be anyone else.

Pulev- Is a tough fight, but Pulev seems too green. Then Whlad will fight either Briggs, for another easy pay day, or Stiverne who will choose Whlad over a Wilder FIght.

Whlad's toughest challenges would be

Wilder- Dangerous Puncher

Fury- Youth, and Size

Stiverne, Jennings are all around best boxers besides Whlad.

Haha is this a joke.

Boring to watch, but Wlad Klitschko has not lost since 2004, holds all the belts, beaten all the top challengers (almost). No question it's Wlad.

Wilder has potential, but he is unproven, protected, rumored stamina issues and a rumored glass chin. However, his power is tremendous. Stirvene is solid but getting older (although Wlad is aging gracefully). Jennings looked "eh" in his last fight.

I think Wlad will hold the belts for another couple of years, tbh.

Wladimir Klitschko