The cue here is fight. Since the fight verb presents itself as plural then we should use themselves to satisfy correctly the sentence. Moreover, the use of itself is when the subject is singular.
For example, The chair moved by itself which was a spooky gesture.
"<span>A shortened, paraphrased version of a text that mentions its key points" would be the proper definition of a summary. Without mentioning the key points, it cannot be a god summary. </span>
