On paper, O'Higgins should be the dominant force here. Their home record is solid, the crowd at Estadio El Teniente will be behind them, and they carry slightly superior individual quality. But Union Espanola have a stubborn streak that the numbers confirm — they have avoided defeat in a large portion of their recent away games, grinding out results when the odds are against them. Our engine believes that defensive resilience will prove just enough to deny O'Higgins a win, with a 50% probability pointing toward a share of the spoils.