Your dreams are a manifestation of the combined day to day events and what is going on in your subconscious mind. Something you overlooked, or something you thought about when you saw the game. It might have triggered something that your brain was trying to relay to your conscious. Your conscious is very much your window to your reality with your subconscious your true reality....it influences but seemingly not fully aware but possibly exist to filter out good and bad....to protect your ego.