4. Your Friend from Thuringia

As police question the attacker, the strange motive for this appalling crime is revealed - sending another shockwave through the world of tennis and beyond.

We learn more about the man who attacked Monica Seles, and a worrying obsession comes to light - exposing the frightening reality that female players have been navigating behind the scenes. We hear about how something innocent can turn into something dangerous; how fandom can become fixation.

Time remains suspended for one of its best players, but the multi-million dollar world of women’s tennis keeps on turning. More revelations plunge Seles into further darkness - but she is a player famed for her fighting spirit. Will she be free when justice is served?

Warning: This episode contains descriptions of violence.

Presented by Clare Balding

Produced by Emma Roberts

Additional reporting by Russell Fuller

Mixed by Gareth Isles

Executive Producer: Joe Haddow

Assistant Commissioner: Rob Green

Commissioning Executive: Stevie Middleton