I find it interesting that the Ennet House Drug and Alchohol Recovery House (sic) is right next to the Enfield tennis academy, because it got me thinking about some parallels between tennis and drugs (or more specifically, sports obsession and substance addiction).
When the book was going over some of the things that addicts/mental patients learn during recovery, it kept mentioning a bunch of strategies and lessons patients are taught in order to regain control of their lives. These continous lessons of control reminded me of the strict sports lessons of James's Incandenza's father, which were then taught by James to his son, Hal (especially those regarding controlling your body). I'm drawing closer parallels between mental patients and tennis players as the novel goes on, in their similarly obsessive, struggling, carefully monitored existence.
This one line stuck out for me: Drug addicts learn "that, perversely, it is often more fun to want something than to have it" (205). That particular passage paralell's Hal's life: he learned that the better he got at tennis, the more was expected of him. The boys at the Enfield Tennis Academy are all competing to be at the top of the rankings, when in reality, the better they perform, the more is expected of them. Hal captured that idea pretty well in this quote from his digital entertainment cartridge, titled "Tennis and the Feral Prodigy": "Here is how to avoid thinking about any of this by practicing and playing until everything runs on autopilot an talent's unconscious exercise becomes a way to escape yourself, a long waking dream of pure play. The irony is that this makes you very good, and you start to become regarded as having a prodigious talent to live up to" (173). This theme seems to repeat itself throughout the novel... deflated dreams, unreasonable expectations, etc.