Abstract: This study investigated the effect of multi-modal imagery on anxiety and perceived stress levels in tennis players. The quasi-experimental design included pre- and posttreatment test subjects and a control group. Male tennis players (n=49) ranging in age from 16 to 18 years old (M=16.96, SD= 0.82) were divided into two groups: (1) a treatment imagery group and (2) a placebo imagery group used as the control group. The 27-item Competitive State Anxiety Inventory (CSAI-2) was used to assess anxiety and the Perceived Stress Scale (PSS10) to assess stress. The results showed a significant multivariate difference (p < .05) between the treatment imagery and control groups in terms of cognitive anxiety, self-confidence and perceived stress. The findings suggest that imagery is a powerful mental tool for overcoming some specific types of anxiety and stress.