The starting lineup in sports is typically decided by the team's coach or manager based on various factors such as player performance, tactics, strategy, injuries, and opponent analysis. Coaches may consider factors like player fitness, form, skill level, and the specific match-up against the upcoming opponent when selecting the starting lineup. Additionally, the coach may also take into account player availability and any specific game plan they have in mind. Ultimately, the starting lineup is decided by the coach's assessment of what will give the team the best chance of success in that particular game.