Chisora squares off against the Argentinian at Wembley Arena, and the London heavyweight has said that he has little to say sorry for, despite being banned by the British Board of Boxing Control for his part in a brawl with David Haye in Munich last year.
"I've nothing to apologise for [and] I have no regrets," Chisora told reporters.
"That's life. What's happened, has happened. What's next, that's what's important and for me that's Saturday's fight.
"After this fight with Avila, Frank Warren and I are going to announce another big fight and I'll fight whoever generates me the most money. I want to put on a show for everyone on Saturday and show I'm back."
Chisora said last week that he will dedicate his fight with Avila to former Prime Minister Margaret Thatcher, following her death.