Alvarez tested positive for clenbuterol back in February and his scheduled May 5 rematch against Gennady Golovkin has been cancelled due to the ongoing situation.

However, despite the Mexican fighter since blaming contaminated meat in his home country for the failed tests, Khan is adamant he shouldn't be given a second chance.

"If anyone is taking any enhancing drugs then they should be banned 100 percent, it should not be allowed," said Khan.

"Otherwise we could all think 'why don't we all take it and have that extra edge?'

"Canelo has now failed two drugs tests and apparently passed a third, maybe because he got off it. But I do not think it means that he should still be able to fight again.

"It will all come down to what the boxing boards and governing bodies say but, in my opinion, if Canelo fights again then it is a sign to other fighters out there that they will only get a slap on the wrist and it's OK to do it."

Khan is set to face Phil Lo Greco on Saturday night at Liverpool's Echo Arena in his first outing since his 2016 defeat to Alvarez.