You might have a fight planned for your story but it’s not going to mean anything if it belongs to a simple hay let’s fight scene.
Fights in your story has to have something that led to it, your character must have motivation to fight.
Even if your character is a big brute who makes a living out of fighting he still needs a reason to do it.
Reasons why people fight include anger, pride, money, and so on.
Remember fight = violence, which needs motivation