The 2025 Club World Cup ended Sunday with an upset win by England’s Chelsea over France’s Paris Saint-Germain. The head of soccer's ruling body called the tournament “the most successful club competition in the world.” It was the first to be held in North America. However, the $2 billion event had drawbacks. Many view it as a dress rehearsal for the 2026 World Cup. Critics and fans alike hope the Club Cup problems will be addressed in advance of next year's event. It will be held in the United States, Mexico, and Canada. It starts in mid-June and ends in mid-July 2026. Extreme heat and violent storms were problems. They stopped games and raised complaints from athletes. Another problem was paltry attendance. So too were transportation issues. They are less of a concern in parts of the world that offer more public transit options. There were also concerns about messaging. Climate change is a big one. Some critics say the International Federation of Association Football (FIFA) is paying a lot of lip service to it. But they're falling short on real action, they say. Climate scientists say the 2026 event will likely have the most damaging climate impact of any World Cup in history. That's because a record 48 nations will travel among three countries to compete. Many Club World Cup players complained after competing in grueling 100-plus degree Fahrenheit temperatures at midday. "It was just ridiculous and it is something that is going to affect everyone next year. Teams and fans will have to be ready," Michael Brown told BBC Sport. Brown is a commentator and former soccer midfielder. Sporting News editor Joe Wright said FIFA should schedule matches in the morning or in late afternoon. That, and perhaps line up better acts for halftime shows to attract more fans. Reflect: What do you think makes an upset victory in sports so compelling to watch?