In the world of rugby, where every point and every win matters, the Nations Championship and World Rugby Nations Cup bring together the best coaches to battle it out. But who truly reigns supreme? As we delve into the win percentages of these coaches, we uncover a fascinating landscape of success and struggle, innovation and tradition. With a focus on the top 20 coaches, we explore the stories behind the numbers, the strategies that work, and the challenges that define each coach's journey. From the innovative Rassie Erasmus to the data-driven Steve Borthwick, each coach brings a unique perspective and a set of challenges to the table. But who emerges as the clear winner? And what does this tell us about the future of rugby coaching? Let's dive in and find out.