Originally Posted by Mike Sams
It's been a Federer/Djokovic/Nadal/Murray dominated top 4 since 2008 (with a glimpse of Del Potro). In order for somebody to enter the top 4, one of the current top 4 guys will have to be knocked off. Who will be the one who gets knocked out of the top 4 and who will replace him? Will it happen in 2013?
Order of probability:
1.Nadal replaced by Ferrer
2.Federer slight chance of loosing a few positions
3.Andy/Nole not likely to be pushed out