As mother to tennis champions Jamie and Andy Murray, Scottish National Coach, coach of the Fed Cup, and general all-round can-do woman of wonder, Judy Murray is the ultimate role model for believing in yourself and reaching out to ambition.

'Come on, it's a tennis story! How can I not love it?!' BILLIE JEAN KING on The Wild Card Four close friends. One big secret. On a hot midsummer day in the Surrey countryside, close friends Kristin, Vee, Bibi and Hailey are celebrating their Ladies' Team victory at the exclusive Royal Oaks Tennis Club. But when their oh-so-charming coach, Jeremy, collapses after tucking into a carefully decorated sponge cake, it seems the season isn't just ending with a championship trophy - but with a murder. Off the court, it's clear that each of the four women has been keeping a dark secret, but...