Coughlin told WFAN in New York that Manning is on his list of top five NFL quarterbacks, defending Manning's proclamation from this summer.
"He's in my top five I will guarantee you that," said Coughlin,"and he has proved it over and over again. The other thing is, fellas, what do you expect him to say? Come on. Come on."
In August, Manning told ESPN New York 1050 he believes himself to be a top five quarterback, saying he considers himself in the same class as Tom Brady.
Coughlin said Manning's confident comments didn't show any arrogance.
"There's none. It's confidence. He has confidence and his teammates have great confidence in him. The one thing he ought to be given credit for is the way he goes about his business. He conducts himself in a very professional manner and always has. He's done things with regard to his team and his teammates that have helped project the proper image on the outside rather than the other way around. No one ever gives him credit for that."