Flavio Cobolli, the runner-up at last year's Roland-Garros tournament, was defeated in the second round of the Masters 1000 in Shanghai by Adrian Mannarino. The match, which lasted three sets (6-1, 4-6, 6-3), marked a setback for Cobolli, who had been one of the standout players of the previous season. After the loss, Cobolli faced a wave of hostile messages on social media, many of which were directed not only at him but also at his father and coach, Stefano Cobolli. Stefano shared some of the messages, including one that read, "Your son should have cancer and die," to highlight the severity of the online harassment. Most of the messages came from younger internet users, according to reports, and the content ranged from personal attacks to threats. Stefano Cobolli, reacting to the situation, urged parents to be more vigilant about their children's online activities. He emphasized the need for greater awareness and responsibility among young users of social media platforms. The issue of online harassment in tennis is particularly pronounced compared to other sports. Unlike team sports, where criticism is often directed at teams or officials, tennis players are frequently targeted individually. This is often linked to the influence of gambling on the sport. Many tennis tournaments are associated with betting operators, and the anonymity of the internet allows for a level of aggression that is less common in other contexts. This creates a paradox: while the financial success of tennis is partly dependent on the betting industry, the same industry can contribute to the harassment of players. The situation has become more intense in recent years, raising concerns about the impact of online behavior on athletes' mental health and well-being.