Abstract : The purpose of this study was to examine the relationship between sprint time, cardiovascular fitness and session's rate of perceived exertion (sRPE) among the professional soccer players during in-season’s training sessions. Thirty participants who officially registered as Perbadanan Kemajuan Negeri Perak Football Club professional soccer players participated in this study. Data were collected during actual in-season training sessions from December 2016 to April 2017. Sprint time performance was determined by the 20m sprint test, 20m Yoyo Intermittent RecoverCODS and y Test Level 1 was used to determine the cardiovascular fitness level of the players. Ten scales rating for the sRPE were asked at the end of every training and testing sessions to determine the selfperception intensity of the players. Pearson Correlation Coefficient was used to analyzed the data and only significant relationships (r=-.657, p=0.00) were found between sprint time performance and cardiovascular fitness performance. Thus, it can be concluded that players who score better time in 20m sprint have a better score in YYIR1. On the other hand, players with high time in 20m sprint scored a less value in YYIR1.