Thanks for the summary. I just recently started following juniors so I'm not really up to date with some of the players. I will keep an eye on some of the names you mentioned
. And yeah, such a shame that injury has slowed Christian's development. I still have hope for him though.
I started following juniors about six years ago. It's fun to follow, but it's awfully hard to predict which players will break through. Case in point: Rhyne Williams and Chase Buchanan were once elite juniors who won major junior events and even won pro titles at the age of 16. You won't see them on any top prospect lists now. Buchanan is a senior at Ohio State where he's arguably the second best player on his team. Williams went to college for two years before turning pro last summer. He still has some potential, but doesn't seem to have a high ceiling. Those are just two examples among many I could have chosen.
Having said that, these seem to be the best American players by birth year:
1992: Ryan Harrison, Jack Sock, Denis Kudla, and Daniel Kosakowski. [Others worth keeping an eye on: Andrea Collarini (transplant from Argentina who excels on clay) and Mitchell Frank (freshman at Virginia)]
1993: Bjorn Fratangelo and Marcos Giron (freshman at UCLA).
1994: Christian Harrison and Alexios Halebian. [Others worth keeping an eye on: Mitchell Krueger and Connor Farren]
1995: Thai-Son Kwiatowski, Mackenzie McDonald, and Luca Corinteli. [Others worth keeping an eye on: Spencer Papa, J.C. Aragone, and Gage Brymer]
1996: Noah Rubin and Deiton Baughman. [Others: Ernesto Escobedo]
1997: Henrik Wiersholm and Eduardo Nava
1998: Stefan Kozlov, Francis Tiafoe, Michael Mmoh, and Nathan Ponwith
This is just a snapshot in time as I see things. It will constantly evolve. In fact, chances are this list will look ridiculously inaccurate in a few years.
If you are interested in college tennis, keep an eye on Steve Johnson at USC (reigning NCAA singles champion), Alex Domijan and Jarmere Jenkins at Virginia, and Bradley Klahn at Stanford, plus Giron and Frank as mentioned above.