Question

Who is Harvard's rival?

Answer 1

Harvard's main rival would be Yale. The two school compete not only in the
sports arena but also when it comes to getting the best students to come to
their school. When Harvard plays Yale in football it is simply referred to as  "The Game." The two schools wait all year for this game and when it arrives the rivalry is very intense.

hope i helped

Answer 2

Their main rival is Yale