Every year there are players who transition from grinding it out on the challenger circuit to slowly fulfilling their promise and begin to win some matches on the tour. In 2011, we saw Janko Tipsarevic go from No. 49 in the world to Top 10.
There are many things that contribute to a rise in rankings. A coaching change, a full year of health and renewed confidence can be the difference between being outside the Top 100 and being in the Top 50.
While this list only covers three players who broke through in 2012, my hat is off to players like Brian Baker, Grega Zemlja and David Goffin who also broke through this year.