Vladislav Ilijin was born in 1950 in Yugoslavia/Serbia. His coaching career began with the state exam in Novi-Sad, Serbia, in 1972. In 1986, he acquired a B-coaching-license for high-performance sports in Germany. The authors' field of activity comprises foundations, advanced and high-performance training in WTB, DTB as well as practical coaching work with WTA players. For five years, he served as a project manager for talent scouting in tennis. His unpublished scientific work addresses tactics in tennis defining a competition as a typical stress situation. He states the hypothesis that optimal performance is attained in a stress-free state. He has been exploring the topic of flow experiences since 1977.