The left-back says he opted against joining Claudio Ranieri's project at Stade Louis II this summer because they would not be competing among Europe's elite
The 19-year-old completed a €15 million move to the French capital last week from Lille, signing a five-year deal with the Ligue 1 winners.
However, les Parisiens coach Laurent Blanc faced stiff competition for the youngster in the form of Claudio Ranieri who was equally keen on capturing the France Under-20 international.
But, speaking to L'Equipe, Digne says the allure of Europe's elite competition, coupled with the phonecalls he received from the club's hierarchy was enough to make him choose Parc de Princes over Stade Louis II.
"The fact that the club are already French champions was definitely a plus, and so is the prospect of playing in the Champions League next season," he said.
"I did not need to be reassured, but I received personal calls from [former sporting director] Leonardo and [coach] Laurent Blanc and that weighed in my decision."
Digne says he will thrive on competing with fellow left-back Maxwell for a starting berth with the French giants this campaign.
He added: "He is a great player with a lot of experience. I can learn a lot of things from him. He is a very nice professional."