Mignolet recently admitted he had his eyes on the No 1 slot for Belgium and was confident of dislodging Courtois after playing a key role in Liverpool’s push for a top-four finish in the Barclays Premier League.
Courtois, on-loan with Atletico Madrid, responded: "Simon can say what he wants, but it won’t make any difference.
"I think I have won points for Belgium (in the qualifying campaign), and I play at a high level with Atletico. You have to know how to stay humble and respectful, and he should remember that.
"It’s not the first time I hear this kind of declaration from him. It’s a pity to read this because I always have been respectful to other keepers, and that is something that should always apply.
"It does where I play. In Spain, you never hear other keepers saying they are aiming to take the place of Casillas. You don’t hear anything like that from David De Gea, Victor Valdes or Pepe Reina. Instead, they all back Casillas, and that is how it should be."