The use of rational emotive behaviour therapy (REBT) in sport psychology has received little attention in research to date but is steadily growing. Therefore, to further aid the building body of research, this study examines the efficacy of REBT (comprising of five counselling sessions, and four homework assignments) in decreasing self-reported irrational beliefs (iBs) and raising self-reported resilience levels in five elite squash players from Malaysia using a single-case multiple-baseline across-participants design. Visual and graphical analysis revealed that REBT reduced self-reported iBs in all athletes and raised self-reported resilience levels in some athletes. Athlete feedback, reflections on the usage of REBT, credos, and practicin...