The midfielder had no doubt that Green would bounce back from his part in an unfortunate second goal for Chelsea.
Parker told whufc.com: "Greeny is a very strong character. There has been more than one time since I have been here that he has kept us in the game. That is what happens. When you are a keeper one mistake is highlighted where I can probably go and make five mistakes and no one speaks about them. As a keeper you make one mistake and it is punished. He is a great keeper."