The 34-year-old was part of the squad that won the controversial 2025 African Cup of Nations title that the Confederation of African Football (CAF) recently revoked and awarded to Morocco after the Teranga Lions were declared to have forfeited the match.
"I believe this will be my last World Cup," said the former Napoli and Chelsea centre-back to Senegalese website Media Car.
"I can't see myself playing when I'm 39. When the moment is right, we'll hand over the baton. I haven't completely made up my mind yet, I have a general idea, but we'll just have to wait and see.
"I prefer not to dwell too much on the future, but it's clear that I'm approaching the end of my journey."
The current Al Hilal (Saudi Pro League) star has made 102 appearances for the Senegal national team, scoring two goals, while featuring in the 2018 and 2022 World Cups.
