Having already added Lionel Messi on a free after Barcelona were unable to offer him a new contract, the French side have been linked with a move for Ronaldo, who is in the final year of his contract at Juventus.
But Leonardo has insisted that there are no ongoing negotiations for the five-time Ballon d'Or winner. "Ronaldo? We do not have any talks open with him," Khelaifi told reporters at the UEFA Champions League draw on Wednesday.
"It's the draw for the Champions League, it's the very highest level and the best competition," he added when asked about the draw, which also grouped PSG with RB Leipzig and Club Brugge.
"It's normal, if we want to go the furthest [the goal] is to win every match and work. We love this kind of match. Manchester City? They are one of the best clubs in the world, with a top team. But we will be ready for this match."
Khelaifi also offered a grim update on Kylian Mbappe's future after it was revealed that Real Madrid had made a third bid for the Frenchman, and were confident of landing him before the August 31 deadline.
"We have always been very clear on the position, and we are not going to repeat every time," he fired when quizzed on Mbappe.
Madrid director Emilio Butragueno was equally tight-lipped, telling Vamos: "I cannot say anything else that you don't know, this is the truth. We should be patient and wait. We have a very good squad and further than this, what you already know."