The purpose of this study was to thick description on the double game strategies(Centered Non-technical Factor) of tennis mania who was high level grade and the professor of national university of education. In order to achieve this purpose, qualitative case study was conducted for 4 participant. Data was collected through in-depth interviews, analyzed that was used the methods of transcription, encoding, categorization, subject formation. During data collection and analysis, data were continuously verified for reliability, validity and ethics. On the basis of the result analysed, the results can be summarized as follows. 1. The partnership‘s importance between the two 2. Main-player and Sub-player roll 3. Anxiety and mental control 4. Muscle crick prevention 5. Climate factor overcome 6. Tennis ball, racket, coat and shoes condition\'s adaptation ※ Key words : Tennis Game Strategies, Tennis mania