Objectives - The aim of the present research was to investigate the relationship between perceptions of received support provided by a coach and athletes’ self-talk. Design - Cross-sectional. Method - Two studies were conducted. In the first study an instrument to assess perceptions of received support provided by the coach was developed, based on the conceptualization of 26 and 27, and tested in a sample of athletes (n = 888). In the second study the relationship between perceptions of received support provided by the coach and athletes’ self-talk was tested through structural models. Participants (n = 465) completed the social support dimensions derived from study 1 and the Automatic Self-Talk Questionnaire for Sports (Zourbanos, Hatzigeorgiadis, Chroni, Theodorakis, & Papaioannou, 2009). Results - The results of the first study supported the factorial structure of the measure, including the dimensions of emotional, informational and esteem support. The results of the second study showed that perceptions of support received from the coach were positively related to athletes’ positive self-talk dimensions and negatively to athletes’ negative self-talk dimensions. Conclusions - Overall, the results showed that athletes’ perceptions of support received from the coach were related to their self-talk, thus stressing the need to further consider the role of social factors in shaping athletes’ self-talk.