The Argentine superstar endured a subdued first campaign in the French capital after only registering 11 goals and 15 assists across all competitions.
Messi did come in for a bit of criticism in the second half of the campaign as PSG only finished with the Ligue 1 title, but Al-Khelaifi is convinced Messi will be at his best next season.
“There is no doubt that Lionel Messi has won the Ballon d’Or a record seven times, and it was not his best season," Al-Khelaifi told Le Parisien.
“But after more than 20 years in Barcelona, he discovered a new country, a new city, a new league, a new team. A new culture. As well as his family, and he was injured also by the coronavirus.
“It was not easy for Messi last season, but next season we will see the best version of Messi ever."