LONDON — There are times when I wonder whether Arsene Wenger is blind to the realities of his team or just plain obstinate.

When it comes to the Arsenal goalkeeper, he is probably both.

If just about every fan, observer and football writer agree on something, it should sound alarm bells. And the vast majority of those who watch Arsenal have agreed over the last two years — since Jens Lehmann left — that the Gunners have needed a top-class goalkeeper.