Why so sure? If he gets back in form by mid-season, it's not a foregone conclusion at all. Of course, getting back to his level of before is not a given either, but whoever is capable of really deep runs in slams and masters can end up in top 10.
You guys are funny. You think the tour's stacked with his best friends who'd like to see him rise, eh? Every one on tour - including the # 1, would like to whack him out of his confidence now that they have a chance. As it is he'll have to try very hard to come back to his consistent brickwall level of play with a wrist that's not been played for long. And if he's to raise the level to his ballbashing best of USO 2009 (and only with that level can he expect to speed into the top ten by year end), he has to dig deep. How much tennis must he play to get to that level. Logically:
Top 50. Yes.
Top 10. No.
Sorry. Hard facts.
Sydney will tell us a lot. So will AO.
I don't know how anyone could know anything about his current condition / comeback possibilities unless you are in his inner circle and have been working with him the past year.
Bangkok 2010. 'nuff said.
...not till 2012.