The 32-year-old scored 30 goals in 34 appearances for the Ligue 1 giants last season.
Ibrahimovic signed a new contract with PSG earlier this year which will keep him at the French side until 2016.
“He’s said he wanted to retire at this club and it will be his last club,” Al-Khelaifi told the BBC World Service. “I am not worried at all.”
“I think he is one of the best three players in the world,” added Al-Khelaifi.
“He deserves to be the best player in the world this year with the things he is doing.”