Symeon Siomopoulos received his PhD in Psychology from the University of Athens, his MSc in Sport Psychology and in Sport Organization from Miami University of Ohio and his University degree on Physical Education with a specialization in tennis from the University of Athens. He has published on the Greek journal of sport psychology and has presented at various congresses on the psychological aspects of sports (like tennis, swimming, diving, karate). He has worked as a sport psychology consultant and a coach with professional tennis athletes and as a sport psychology consultant with athletes of various sports (soccer, basketball, volleyball gymnastics, windsurfing and others). Since 2019, he has been an educator of Chinese tennis coaches on topics relevant to the psychological aspects of tennis. As an adolescent he was placed at the first places of the Greek tennis rankings. He has been the founder and the head coach of the Deree tennis academy from 2011 to 2021. He is currently an assistant professor in Deree (teaching Sport Psychology, Sport Pedagogy, Sport Coaching, Strength and Conditioning and Introductory Psychology) and the tennis director of Academy Camps in Connecticut, U.S.A..