"When I look at heavyweight boxing, you look at [Wladimir] Klitschko and he wanted to be a three-time heavyweight champion of the world, he lost and came back - If I lost, I'd dust myself off and go again".
The fight will be the first heavyweight unification title fight to be held in the United Kingdom between two undefeated fighters and although Joshua is the hot favourite and headline name, Parker is hoping to etch his name into the history books.
In general, the WBO champion has remained on home soil with 19 of his 24 fights to date taking place in New Zealand, although he did fight in Samoa back in January 2016 in honour of his Island heritage.
"Twenty fights, twenty knockouts, and every single person going into the fight - they believed they had the key. But if he's going to win this fight, he needs to draw down on all that skill and he needs to produce a career-defining fight by fighting his best performance".
"Let's say we can look in the crystal ball and, God willing, I do become victorious - then we can start talking about future plans".
"He's quick and can take a punch", added the WBA, IBF and IBO champion.
"I want them to say it to Anthony Joshua because Anthony Joshua wants them to say it to his face".
GETTYJoshua has already experienced the glory of winning in front of a huge crowd
"Everybody has an idea, everybody is confident that they have the key to beat Anthony Joshua, and every single person who has tried, has ended up unconscious", said Haye.
"I know if I catch him clean, he's out". I feel it is my time, I am young, fast, strong and determined to win.
"Instead, he goes around America shouting "bomb squad" and that he is the WBC world heavyweight champion but, only when he's ready to sign the contract, we will find out what he's really about". I'm here to be part of history, doing it for my team, family and country.
The eyes of the boxing world will be on Cardiff as Londoner faces Kiwi Parker on Saturday night in a heavyweight unification bout.
"This has been the most enjoyable time we have spent together for the last eight years", Barry said.
But Rob McCracken, Joshua's trainer, countered by saying: "Being relaxed and comfortable preparing for fights like this doesn't do anything for what happens when you are in there facing Joshua. So my first challenge for Anthony Joshua is; be on time mate for the first time in your life".
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They held signs that read, "why do your guns matter more than our lives?" and "our ballots will stop bullets". The Toronto protest coincided with at least 16 rallies planned in other Canadian cities, from coast-to-coast.