Town need a win over the Sky Blues to be sure of avoiding the drop and Saunders wants the supporters to play their part.
He told the club website: “I’d like our fans to send a good luck message to the players.
“The lads know how important the game is for the club, themselves, their team-mates and the fans, but I would be delighted if as many of our fans took the time to send the players a message to show how much you are behind them and the club on Sunday.
“It could make all the difference!
“Every message we receive will be posted up on the dressing room walls and it would be fantastic if those walls were full of messages of support from our supporters on Sunday.”