Originally Posted by BirdieLane
Could you expand on this?
I'm not sure what you are asking, but just look at the rankings and you'll see the highest ranked american player is John Isner, former college player. In doubles, the highest ranked are the Brian Bros, former college players. Some recent grads from this year have also broke in the top 250 or better after only a few months on the tour.
In women tennis, things are different, but there are still examples of college players doing very well, e.g. Burdette former player at Stanford who went pro this summer and went to 3rd round of US Open and won several big matches on the tour.