Anthony Joshua and Alexander Povetkin will make their ring walk at 21:50 BST on Saturday

Live text commentary from 20:00 BST on the BBC Sport website

Tony Bellew says it is an absolute disgrace boxers convicted of doping are allowed back after serving bans – and he predicts a fighter will be killed at the hands of a drug cheat.

It comes as Alexander Povetkin – who has had two doping convictions – fights Anthony Joshua at Wembley on Saturday.

Joshuas WBA, WBO and IBF heavyweight titles are on the line against the mandatory challenger from Russia.

It shouldnt be even taking place, said fellow British fighter Bellew.

I feel loads of pressure going into Povetkin bout – Joshua

Podcast: Should we be more excited for Joshua v Povetkin?

Joshua – marks out of 10 from those closest to him

Povetkin – the 2004 Olympic super heavyweight champion – first tested positive for meldonium in May 2016, and wasbanned from the sport indefinitelywhen he failed a second drugs test the following year.

At the time of his first failed test, Povetkin saidhe had stopped taking meldoniumin 2015, before it became a banned substance.

In November 2017, the 39-year-olds ban was reduced to a year and Bellew, the former WBC cruiserweight world champion, says boxing authorities do not take doping seriously enough.

It is an absolute disgrace that these guys are getting to fight, the 35-year-old told BBC Radio 5 live Breakfast.

Giving time served bans is not doing anything. Alexander Povetkin, lets just be straight and honest, should not be even in this fight.

It shouldnt be even taking place, but it has to take place all because of governing bodies and sanctioning bodies.

He added: Mark my words, one day its going to happen – someone is going to be killed at the hands of a drug cheat.

Saturdays bout, which should draw a crowd of about 80,000, will be 28-year-old London 2012 Olympic champion Joshuas fourth consecutive stadium fight.

The ring walk is expected to be at about 21:50 BST.

Bellew said: Im pretty sure Anthony Joshua wouldnt choose to face Alexander Povetkin, and not because hes scared of him or thinks hes a brilliant fighter – because Anthonys shown that hell face anybody.

Why would you want to face a cheat when you dont have to? You know this man is capable of cheating. Its not been a one-off mistake.

Media playback is not supported on this device

US Open first round – McIlroy among early starters

Read more on US Open first round – McIlroy among early starters

Read more on Liverpool host Norwich in season opener

Read more on Why did Messi walk away from Argentina?

Is Anthony Joshua finished as a boxer? Tyson Fury thinks so…