Tennis Case Study Athletic Insight - Case Study. Focuses on whether feedback based solely on performance outcome measures may be effective in helping one player improve his National Tennis Rating Program (NTRP) rating. The participatory and individualized nature of the feedback used and the effects of the feedback on the player's intrinsic motivation to practice tennis are also discussed. Abstract and References are included. in Tenniswith athleticcasefeedbackfocusesinsightsolelystudytennis