A new visa category launched by the Chinese government to attract young science and technology professionals is causing fervent backlash in China, where well-educated young people are already struggling to find work.

By the third game of the second set, Coco Gauff was throwing her arms to the heavens in Beijing. Amanda Anisimova had just arced a forehand return winner into the corner to earn two break points on Gauff’s serve, and the world No. 3, who has built so much of her WTA Tour reputation as a formidable defender, had no idea what to do.