Vice-captain Milner has pointed to how Mignolet's professionalism is forcing Alisson to maintain his standards between the sticks.
“To be successful, you need a good squad," said Milner. "It's impossible to win or challenge for a Premier League without that, and it's the same in Europe.
"The amount of games you play, the injuries and suspensions you will pick up.
“Someone who hasn't been spoken about much this season, but Simon Mignolet. It's incredible how he is around the training ground, he has the best attitude I've ever seen in my life.
"Every single day, he pushes himself and pushes Ali and the boys to improve. Nobody will ever speak about him in the press because he's not on the field, but he's been so important for us this season.
“That's exactly what you need, great characters. Even if you're not playing as much as you would like, the characters in the dressing room are still standing up."