'I didn't really watch any tennis': how Martin Parr captured the Grand Slam's real champions

The photographer toured the four tournaments shooting thrilled fans instead of sweaty stars. He talks about why street photography is becoming impossible - and life after his cancer diagnosis It's the morning after the night before at the US Open and the sports sections contain images of triumph and defeat. Ecstatic Emma Raducanu lying prostrate on the tennis court. Bereft Novak Djokovic sobbing into his towel. The photographer Martin Parr would have liked to have watched the finals, but he's be...