Derek Chisora and Robert Helenius call for severe punishments for doping cheats

Veterans Derek Chisora and Robert Helenius have called for stronger bans for drug cheats ahead of their respective fights at London’s O2 Arena on Saturday.

Anthony Joshua will step into the ring with last-minute opponent Helenius after Dillian Whyte was pulled from the Matchroom show last weekend following a failed drugs test.

Whyte has vowed to prove his innocence but the “adverse analytical findings” detected in his test by the Voluntary Anti-Doping Association (VADA) almost saw the bumper card cancelled before Helenius was drafted in.

They throwdown on Saturday