Chelsea were furious at Roth's attack on Mourinho, who has threatened to sue the German.
But Roth said: "I am looking forward to that. Referees should not have to live with death threats. It's about more respect, respect, respect. It can't be just all about money. If you only see the money, you are going to destroy the game."
UEFA are clearly determined to use the shock retirement of Frisk to help bring about a change in attitude from players and managers.