He wasn't that old, he retired before turning 30, but he was struggling with injuries, a bad shoulder injury in particular.
Last time I read about him he was a pharmacy student.
Yep, that was it. I met Alex as his driver at a tournament, we had great conversations and he seemed like such a smart guy. But then the shoulder problems started and he never really came back after that. I think he tried surgery with a doctor in Heidelberg? The info might be in his thread here (only a few people ever posted in it). Kristen tracked someone down in Australia one year and that's how we learned that Alex had given up on tennis and gone back to school. I believe he was also engaged at that time. I have no doubt that whatever he's doing he's successful at it.