The purpose of this study was to examine the psychometric properties of the Portuguese versions of the Sport Anxiety Scale and of the Brief COPE, as well as of the Cognitive Appraisal Scale in Sport Competition– Threat Perception, namely regarding their factor structure validity and internal consistency. Participants were 550 male and female athletes of several sports, aged 15 to 35 years old (M=19.8; SD=4.5). Exploratory and Confirmatory Factor Analysis indicated that the instruments demonstrated good psychometric properties. In general, the measurement models provided a good fit to the empirical data and with the exception of some scales of the Brief COPE, the calculated Cronbach's a coefficient of reliability indicated adequate internal consistency for the three instruments. Overall, the results of the present study provided evidence for these instruments' validity and reliability, ultimately supporting their importance for research and psychological intervention in sport contexts.