nick kyrgios and jerzy have superb potential . i believe they will be heard from in the next 2-3 years.
the game has changed. now there is a maturation process involved for the youngsters. there are too many experienced sharks on the tour so it takes a while before you can start challenging them.
average age of a touring pro in the top 100 is near 27.
I cant really think of any others. perhaps there is somebody in the pipeline in spain.