The phrase "was neck and neck" is used to describe a situation where two opposing entities are at the same level or competing equally. The opposite of this phrase can be described in various ways, such as "one-sided," "unequal," "outclassed," "dominant," or "uneven." If one team or individual is better than the other, it can be said that they are "pulling ahead" or "making progress." Alternatively, if there is no competition at all, one can describe the situation as "a cakewalk," "no match," or "a landslide victory." In essence, antonyms for "was neck and neck" vary depending on the context and the degree of competition between the entities involved.