Casillas was speaking with fellow former Spain goalkeeper Santiago Canizares.
On the Super League project, Casillas said, "I don't know if we should be heading towards a new world, with new challenges. And I don;t know whether people have realised or not that things have to change."
When asked whether he liked modern day football, Casillas gave a blunt reply: "No," and told Cañizares that he loved very second and "really enjoyed" being between the sticks and never suffered.
"How I envy you!" was the ex-Valencia and Spain keeper's response.