What a GREAT player he started of to be... and since 2005 it's started to go down hill. There's not even a obvious reason for it. He's just lost something that he used to have....
This year's going to be critical for him if he wants to stay in the top 5. He's got the talent.. he just needs some more will power and just a change to everyday things.
He's definitly lost that passion for tennis that you could see in him 3 years ago. Maybe it's because of Federer and his constant defeats or maybe it's the American pressure. I don't know.
I think a Grand Slam win is crucial for him in this next year.. although im really doubting it.