"I was never motivated by money. I thought above all else about the happiness of my family, regardless of money. I regret that some people think this is the case."
Among the challenges he has signed up for at the Parc des Princes this term will be PSG's quest to reclaim the Ligue 1 title from Monaco, who in May denied the Parisians a fifth straight championship.
When asked if he feels the burden of becoming the most valuable player of all time, surpassing Paul Pogba following his 89m move to Manchester United a year ago, Neymar cracked a joke.
"It's not an extra burden. I weigh 69kg and I'll remain at 69kg."
For Al-Khelaifi, there were no second thoughts when it came to launching an historic bid for the striker who excelled alongside Lionel Messi and Luis Suarez - forming the "MSN" strike force - for four years at Barcelona.
"For me, Neymar is the best player in the world, so we wanted to have the best player in the world," he said.
When asked about the unprecedented transfer fee received by Barcelona, Al-Khelaifi said: "Today, it might seem expensive. But in two years, it might not any more.
"Concerning Financial Fair Play, we have always been transparent."
Barcelona, meanwhile, have passed details of the deal to Uefa so the governing body might "determine the disciplinary responsibilities" concerning issues of Financial Fair Play and adherence to European transfer rules.