Man City are dominating English football, but journalists in Germany are raising question marks about how they achieved their success. Christoph Winterbach, a reporter for Der Spiegel, tells the story of Rui Pinto, the Football Leaks emails, and the revelations that followed.

Football on Trial is a Tortoise Media production for BBC Sounds and BBC Radio 5 Live.

Host: Clive Myrie
Writer: Xavier Greenwood
Producer: Xavier Greenwood, Andrew Butler
Original music: Tom Kinsella
Sound design: Tom Kinsella, Karla Patella, Tom Burchell
Development producer: Jess Swinburne
Editor: Jasper Corbett