Steffi Graf dominated women's tennis for three years as world number one, appearing unbeatable. However, a teenage player from Yugoslavia emerged with an aggressive style and distinctive grunting, challenging Graf's supremacy and the established status quo. This emerging rivalry captivated audiences, but behind the scenes lurked darkness.

The narrative explores how Monica Seles' record-breaking achievements were sidelined due to breaches of etiquette, and what it was like for young girls navigating the adult world of elite tennis in the 90s. In the shadow of Graf's indominability, the podcast questions what made people believe Seles could be the greatest player the women's game had ever seen. Furthermore, it details a collision course between the two players that tragically ended with one competitor in hospital.

Presented by Clare Balding and produced by Emma Roberts, the series features additional reporting by Russell Fuller and sound mixing by Gareth Isles.