Match-fixing has shown itself to be a controversial and widespread threat to the integrity of sport. Along with multiple match-fixing scandals that have come to light in various sports and countries, academic interest in match-fixing has increased in recent decades. While several researchers from a variety of scientific disciplines have attempted to explore and understand the complex and multifaceted nature of match fixing, research on match fixing still remains empirically and theoretically underexplored. This doctoral dissertation helps to fill this gap by exploring, mapping and understanding match fixing in sport. This dissertation aims to go beyond just describing match fixing, to contextualize the phenomenon and help to better explain it.