PSG president Nasser Al-Khelaifi says he's never spoken to LaLiga chief Javier Tebas "behind his back".
Tebas has pushed FIFA and UEFA to investigate PSG's transfer spending after last year's world record deal for Neymar.
Al-Khelaifi told Marca: "I have never spoken about Tebas behind his back, but he does it.
"The last time we spoke I was clear with him. It's better to say things to someone's face. He attacks everyone, like Juventus, Inter and PSG. He should focus on his business, on LaLiga Santander and the Spanish clubs, and he should allow the others to work. He doesn't have to worry because we're not going against LaLiga Santander. He should leave us alone, and the others too."