A few factors were in play I believe.

Firstly, he looked old: he looked in in his previous fight too.

Secondly, met an opponent who was bigger, faster & slicker than him. Wladimir has been used to fighting smaller & less skilful men than him & he's nearly always had all the advantages.

Thirdly, in the Fury's he met a fighter & a team of guys who would not allow Wladimir & his crew to intimidate them & dictate terms. The issues with the canvas being too soft & the Fury's threatening to pull out at the last minute if the canvas wasn't stiffened up was genius & really unsettled Wladimir.