If it was in 2007 he would have sounded a bit less ridiculous maybe, but if he said it in 2008 there's no way to justify that.
Even as a huge Murray fan, I think it would be ridiculous at any point in their careers. I mean, even if it somehow looked feasible early on hards or grass, clay?
Anyway, I know it was pretty early in Gimelstob's commentating career, when he was popping out bold and asinine comments left and right to fill silence. Pretty sure it was '08.