Nothing much was going right for Emma Raducanu, Britain’s budding tennis star, in her late-evening match Monday on Wimbledon’s Court 1. Trailing Ajla Tomljanovic, 6-4, 3-0, Raducanu retired because of breathing difficulties, a circumstance that prompted John McEnroe to speculate that she had been overwhelmed by the moment. And that opinion prompted swift and angry condemnation.
