The second chapter explores performance anxiety through the case of Jack Slater, a professional tennis player whose once-motivating pre-match nerves evolved into debilitating anxiety. Initially, Jack’s mild anxiety enhanced his focus and drive. However, over time, intense fear of negative evaluation, particularly during high-stakes or public matches, led to panic attacks, avoidance behaviours, and significant performance decline. Jack’s experience illustrates the distinction between helpful and harmful anxiety, highlighting the diagnostic category of performance-only social anxiety disorder, where fear is confined to evaluative situations without broader social avoidance. Assessment tools and evidence-based treatments are described, including emotion regulation strategies from dialectical behaviour therapy, cognitive reframing techniques, and body-based practices such as breathing exercises and progressive muscle relaxation. These tools help performers build somatic awareness, manage physical arousal, and reshape fear-based thinking patterns. The chapter advocates a personalised approach that integrates psychological support into performance environments. By understanding the anxiety continuum and using targeted strategies, individuals can transform anxiety from a barrier into a performance-enhancing resource, supporting both excellence and wellbeing in high-pressure settings.