1)Nikolay Davydenkol is just a grinder, like Hewitt, who doesnt have any weapons to hurt you. -No, his backhand and his forehand are both as good as Federer's.He is one of the most powerful players I have ever seen. 2)Gonzalez's backhand was a huge liability before he started working with Stefanki. -No, It was nearly as powerful as his forehand and pretty much always went in, I don't know why Stefanki completely changed that shot but he has destroyed it. 3)Nadal is just a grinder. -see no. 1 I'll add to this later.