Derek Chisora has told Anthony Joshua he must KO Jake Paul early on in their shock clash.Former two-time heavyweight world champion Joshua announced that he would face YouTuber-turned-boxer Jake Paul in a bizarre clash on December 19. Joshua is an overwhelming favourite to get the job done and on quickfire fashion, given the vast gulf in squared circle experience between the pair.And many believe that AJ has to get the job done early to avoid potential backlash from the boxing world, and miss out on a new push to heavyweight world titles.Chisora, a good friend of Joshua, gave his first thoughts on the bout on talkSPORT Breakfast.And when asked if he’s spoken to the Briton about the clash already, Chisora revealed he has already made his prediction in private messages.He explained: “I hope it’s not a game, I want to see blood and someone’s teeth falling out.“I’ve already messaged Anthony Joshua about the fight. I was like ‘Listen, if this goes past five rounds, people will have a go at you’.“You can’t go past five rounds with this kid. He has to go one or two rounds, if it goes past five people will be doubting you as a fighter.“He has to smoke him out exactly like he did to Francis Ngannou in Saudi Arabia.On AJ’s stance, Chisora added: “No he’s not worried [about going past five rounds]. I’m not worried, I’m gonna be there, he will smoke him.“I have no doubt about it, I will be there in Miami.”Joshua and Paul stunned the world by announcing their controversial boutDerek Chisora’s views on Paul vs JoshuaJoshua’s clash with Paul has been under fire from various corners of the boxing public.talkSPORT pundit Gareth A Davies even went as far as suggesting the fight shouldn’t be professionally sanctioned.But nonetheless the contest will be a full licensed bout, and it will count on both Joshua and Paul’s records.Chisora understands why the fight is happening, and is not against it with the sport now having a huge entertainment factor.He continued: “Listen, we are in the game of entertainment.“People are going to buy tickets to watch these two fights, we are all entertainers either way.Chisora told talkSPORT that he has begged Joshua to get the job done earlytalkSPORT“I’m happy for AJ because he is doing this for himself. And you have to give respect to Jake Paul.“Whatever he says he wants to do, he is making it happen. Kudos to the kid, he’s a great promoter of everything he does.”Why is Anthony Joshua fighting Jake Paul?Joshua has fought some of the best heavyweights of the era, so it has come as a surprise to many that he has elected to face Paul.But the 36-year-old insists the potential of generating huge commercial numbers was the deciding factor.He said: “Jake or anyone can get this work. No mercy.“I took some time out, and I’m coming back with a mega show. It’s a big opportunity for me.Joshua has the measure of Paul in quite literally every aspect possibleGetyy/talkSPORT“Whether you like it or not, I’m here to do massive numbers, have big fights and break every record whilst keeping cool, calm and collected.“Mark my words, you’ll see a lot more fighters take these opportunities in the future. I’m about to break the internet over Jake Paul’s face.”