Diego Maradona (out Jul 25) is a terrific, narration-free documentary that uses grainy video tapes from the 1980s to explore the life of the infamous football star. It shows us the power of sport and the way it can inspire the masses. It also has something important to say about the perils of wealth and success. Oscar winning director Asif Kapadia (Senna, Amy) has delivered again. Grade: A-.