It's very likely that Rafa will struggle to defend all these points next year. Several reasons: He's susceptible to injury. It's unknown how he'll react to being the hunted, not the hunter, not to mention all of the sundry pressures and attention that visit the #1. Most of all, Murray's take this week: He said players believe they can beat Rafa more so than they thought they could beat Roger in 2005, 06. He thinks Rafa will be upset more than Roger was. If Roger relaxes a little bit and geta a fire in his belly, I could easily see him trading #1 with Nadal and possibly Djokovic in the next few years.