Photograph: Mike Stobe/Getty Images
Sit close enough to a tennis court when Alex de Minaur is at full velocity and the sound of shrieking, audible and ever-present during a point, tells the story of the busiest feet in tennis.
The shoes of the Australian, who has played with rare verve at the US Open over the past week, squeak and squeal as he scampers to retrieve shots that would pass most others by. Like the roaring and purring of a Formula 1 car racing around a track, the noise made by the No 13 seed’s dancing feet alters depending on how fast and furiously a rally is unfolding.