After leaving the stage, Joshua said: "This is where I'm at right now, I can't sit down for too long because there's always people clucking around me feet".
Anthony Joshua admits becoming undisputed champion is another "gold medal" achievement, but he must firstly overcome Alexander Povetkin in a Wembley "scrap".
Pacquiao, the only eight-division world champion, scored his first KO win in over nine years after stopping Lucas Matthyse to win the WBA welterweight title. If I missed a drugs test or am an hour late then people will say "Oh, he must have been doping".
"I would rather take a loss than be done for doping", Joshua said. If you lose you can respect the man who beats you and bounce back.
Here is all you need to know about the fight and how to get tickets...
But Povetkin has gained a reputation as a drug cheat after two arranged fights fell through after he failed tests.
Joshua says: 'It was unfortunate for his opponents at the time but at least I know he will be fighting clean against me'.
Russia's track and field team was banned from the 2016 Olympics and their whole team was not allowed to take part at the 2018 Winter Olympics in response to the doping allegations. Unfortunately there was a time scale and it didn't happen so I have a mandatory fight.
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"I'm looking forward to this great project", Vargas said.
"If Wilder doesn't want the fight, then Miller is a definite front runner, especially after today".
"They don't want to watch us negotiate in the ring, they want to watch us go to war, and that's what I stand for".
Joshua is phlegmatic, saying: 'I am not the lawmaker in this.
"Accessibility and flexibility has driven our business to the success we have already enjoyed", he adds. I am enrolled with UKAD and WADA and I pay £30,000 a test. Right before the fight I licked some meldonium or some ostarine to have no affect and be caught with it right before the fight.
Attempts to secure WBC champion Deontay Wilder as his opponent, before the confirmation of Povetkin, ended in frustration and are expected to be revived for Joshua's next date at Wembley on April 13, but the champion has learned not to look beyond his coming fight.
It will be the third time AJ has fought at Wembley after knocking out Wladimir Klitschko there previous year and boxing on the undercard of Carl Froch vs George Groves in 2014.
"When people just play around with you, I tell them that boxing is an emotional sport".