Do you become distracted after arguing with an official about a bad call he made even when you knew the official was not going to change his call? You might have became upset or frustrated, lost your composure, and it affected you for several minutes to follow or even the rest of the game.
Focusing on stuff that is beyond your locus of control is a distraction at the very least. You can classify all result-oriented thinking about outcomes into thoughts or “events” that are beyond your direct control (in the present moment). Athletes who focus too much on results, instead of the process, are likely to become anxious, scared, worried, and perform tentatively at best.
Check out The Composed Athlete program to improve your composure.