Final answer:
The sentence should be formatted using subject-verb agreement.
Step-by-step explanation:
The sentence in question should be formatted as follows to ensure subject-verb agreement: "Nobody, save for a few of the most passionate fans, believes that the Winchester Rams can upset the Fairview Wolves this Saturday."
In this sentence, the subject is "Nobody" which is a singular noun. In order to maintain subject-verb agreement, the verb "believes" should also be singular.
By using a singular verb, the sentence correctly expresses that nobody, including the few passionate fans, believes in the upset victory for the Winchester Rams.