This research aimed to analyze the role of Psychological Well-being factors in young professional tennis players, assigning special attention to their preferred coping strategies and perceived autonomy that specifically contribute to Psychological Well-being. The conceptual framework utilized for this study was Ryff's Psychological Well-being multidimensional model in order to focus our understanding towards how environment demands of professional sport affect athletes Psychological Well-being. Participants were 155 male professional tennis players with a mean age of 14.61 (SD = 1.86) engaged in South American Tennis Federation tournaments. Instruments utilized were Psychological Well Being Scale EBP, Díaz et al., 2006, Sport Coping Approach Questionnary Spanish version, ACSQ-1 (Kim, Duda, Tomas, & Balaguer, 2003) and Sport Perceived Autonomy Scale, Spanish version (Balaguer, Castillo, & Duda, 2008). Our research revealed that the greater autonomy young athletes perceive while being engaged in professional sport was because of the coping strategies they utilized such as active planning, cognitive restructuring, emotional calmness and seeking of social support. Results confirmed also that the greater perceived autonomy was explaining athletes high levels of Psychological Well-being.