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Clarke has an undefeated seven-fight professional record ahead of his showdown with Allen on the undercard of Liam Smith's rematch with Chris Eubank Jr in Manchester on September 2, live on Sky Sports Box Office.
But Allen, who holds a victory over former WBA champion Lucas Browne, is supremely confident that he will inflict a crushing first defeat on Clarke.
The fight will be contested over 10 rounds in the Heavyweight division, which means there is no weight limit.
Here's everything you need to know about Frazer Clarke vs Dave Allen.
When is Frazer Clarke vs Dave Allen?
Date: Saturday, September 2.
The fighters are expected to ringwalk at around 9:00 PM BST at AO Arena, Manchester, United Kingdom, which is 4:00 PM EST or 1:00 PM PST on the West Coast of America.
What has been said?
"I am the underdog with the bookies and probably with everyone but in my eyes, I am a big favourite," Allen told Sky Sports.
"It is a fight I fully expect to win and it is a fight I was massively surprised to get the call for.
"I didn't think I would get the call for this fight to be honest so I expect to win.
"I am the underdog to many people but, to me, I fully expect to win."
"Frazer is an old friend of mine, I have known him since 2012 from the amateurs and we have always got on great," said Allen.
"I respect him massively as a man and a good fighter. You don't win Olympic medals if you are not a good fighter but I would say this is a big mistake.
"I genuinely really, really fancy the job and if I didn't, I wouldn't be doing it.
"I just think I am better all around. People might laugh at that but I expect to outbox him and to knock him out to be honest.
"I am not just saying that, I haven't got to talk anything up.
"For once I can come in quietly and go about my business but I fully expect to beat him."