Dr. Bernd Strauss, PhD, is a Full Professor of Sport Psychology in the Faculty of Psychology and Sport Sciences at the University of Münster, Germany.

Stephanie Buenemann, MSc, is a PhD student in the Department of Sport and Exercise Psychology (Faculty of Psychology and Sport Sciences) at the University of Münster, Germany.

Dr. Charlotte Behlau, PhD, is a post-doctoral researcher in the Department of Sport and Exercise Psychology (Faculty of Psychology and Sport Sciences) at the University of Münster, Germany.

Dr. Maike Tietjens, PhD, is an adjunct Professor at the Institute of Sport and Exercise Sciences and Vice-Rector of Career Development and Diversity at the University of Münster.

Dr. Katherine Tamminen, PhD, is a Full Professor in the Faculty of Kinesiology & Physical Education at the University of Toronto.

Chapter 1 Introduction to crises in sport.- Chapter 2 The concept of Crisis Decision Theory.- Chapter 3 Context and fundamentals of a crisis through the lens of dynamic complex systems.- Chapter 4 Negative performances within a game on a team level.- Chapter 5 Stress, stressors and dealing with them.- Chapter 6 Overcoming crises with effective coping and emotion regulation.- Chapter 7 Mental health crises in elite sports. Chapter 8 Sexualized violence in sport as a crisis.- Chapter 9 Doping in sports - crisis on the individual, the sports and a systematic level?.- Chapter 10 Crisis communication.- Chapter 11 Athletes' (self-)presentation in the media - crisis or potential?.- Chapter 12 The COVID-19 crisis and its influence on sport.- Chapter 13 Personal crises in athlete: Injuries and Retirement.- Chapter14 Conclusion and perspectives: A proposal for a joint crisis theory in sports.