Cavani and Ibrahimovic spent three years playing alongside each other in the French capital, where they helped establish PSG's dominance in Ligue 1.
Former LA Galaxy player Michael Ciani, who played with Ibrahimovic last year, reveals Cavani was one of the four teammates the Swede hated.
"If you are close with Cavani, Ibra doesn't like it," Ciani told RMC Sport. "Either you are with Ibra or against him.
"He told me that everything was fine with Laurent Blanc at PSG. The only person he did not get along with was Cavani.
"He told me that he had only hated three or four teammates in his entire career... and one of them was Cavani."
After two years with LA Galaxy in Major League Soccer, Ibrahimovic returned to the San Siro for a second stint with AC Milan.