yeah, his serves were plain awful in the final 2 sets, although hard to make excuses for a 20 year old, esp when Johnson went straight from team championships to individual tourney.... Rhyne is the best player in NCAA in my opinion, stinks that he couldn't pull it out. Not sure if it makes sense for him to return for another season though.
I'm not sure it makes sense for him to come back either. If fitness is his biggest obstacle at this point -- and that appears to be the case -- then he should go pro.
The only thing I've seen from Rhyne was by way of the live video streams of the matches from this tournament. Obviously not the best quality, but enough to make general observations. And here is what I gathered about Rhyne:
Generally: He is a bit of a streak player. This isn't what you want, but the stuff he shows when he is on his game is pro material stuff.
1) His forehand is an absolute thing of beauty. It reminds of Marcelo Rios'* forehand b/c of the whiplash nature of it. The result is different than with Rios, though, because Williams is a much bigger guy. What I"m saying is that while Rios' forehand was merely pretty, Williams' forehand is a damn cannon.
2) His backhand is fine. He runs around it more than he should, and sometimes he gets burned. He needs to trust his backhand a bit more, because it is a solid stroke. Not an absolute weapon like his forehand, but it wouldn't be a liability on the tour.
3) His first serve percentage is way too low right now. But when he increases it, he'll rarely get broken, even at the pro level.
The one aspect of his game that could use some work is his net game.** I believe he is aware of this, and is, as a result, very reluctant to come into the net and finish points when he's put his opponent in a really bad position. This is true of a lot of young players, though, and he'll just need to work on moving forward and closing points. Nadal improved in this regard with time,*** and so it can definitely be done.
*One of my favorite players of all time, btw.
**Sandgren, on the other hand, has an impressive net game.
***A guy like Gael Monfils, on the other hand, apparently never worked on this aspect of the game and undermines his excellent groundstrokes by rarely if ever coming and and getting easy putaways. I'm a baseliner myself, so I understand the reluctance, but a pro player should have this in their bag of tricks.