Expertise in interpreting is developed through practice, which therefore is key in interpreter training. This article seeks to provide a thorough insight into the evolution of the expertise and deliberate practice approach, as well as examine its application as part of the ST module from a student’s point of view. A review of literature revealed that the expert-performance framework marked a turning point. The expertise and deliberate practice was then analysed through the prism of interpreter training, as part of the Supervised Training module at the FTI. Studies that challenge the expert-performance framework in favour of a multifactorial model, as well as views reconsidering the definition of deliberate practice were then explored. As for the author’s reflection, it is argued that the expertise controversy furthered understanding into human potential and the framework serves as a useful guide to attain competence in interpreting. Deliberate practice is an invaluable training tool and the module’s design fosters learning. Nevertheless, learners may benefit from greater awareness of the underlying theory to ensure group practice is truly effective.