Tyson Fury has reversed his decision to retire from boxing, insisting he is "here to stay".

His erratic behaviour, however, has concerned those close to him, and led to his friend Billy Joe Saunders fearing he will be dead by 30 if he "doesn't get the help he needs".

Fury, 28, did little to help fears surrounding his condition when he unexpectedly announced his retirement on Twitter earlier on Monday while describing boxing as "a pile of s***" and "the saddest thing I ever took part in".