Research on athletes' readiness levels improves the training process and the selection procedures for young basketball players. The aim of this study was to examine the differences in motor abilities and the level of readiness between Croatian and Slovenian junior basketball players. The study was conducted on a sample of Croatian and Slovenian junior basketball players (N=30). To assess general motor abilities, the following tests were used: 5, 10, and 20-meter sprints, lateral steps, 3kg seated medicine ball throw, hand grip, and countermovement jump (CMJ). For the assessment of specific motor skills, the One-minute shooting test and 20-meter sprint with the ball were used. Statistical data analysis was performed using Statistica 14 (TIBCO Software Inc., USA). Differences in the motor abilities of Croatian and Slovenian junior basketball players were determined using one-way analysis of variance (ANOVA). The results of this study show that Croatian and Slovenian basketball players differ significantly in strength and explosive power related to throwing, while no differences were found in other general and specific motor ability tests. Investing in the development of motor abilities during the junior years can have positive effects on the careers of young basketball players. The participants and coaches could use the results as an opportunity to enhance skills and achieve excellent results.