’s is in”critical condition” in hospital after dropping his WBC and lineal light-heavyweight titles to Ukrainian Oleksandr Gvozdyk at Quebec City.

Stevenson, 41, who was ’s earliest and longest reigning champion, suffered an 11th-round knockout, slumping at the corner after a flurry of punches.

He was placed to a stretcher, prior to being taken to hospital by ambulance.

Stevenson’s promoter Yvon Michel stated his boxer was in intensive care.

“The WBC and community from the planet unite in prayers for the safe retrieval of our dear friend, fantastic fighter and exemplary human being @AdonisSuperman,” that the World Council tweeted.