The phrase "evenly matched" refers to two opponents or teams that are almost identical in strength or ability. The antonyms of this phrase are "unequal," "lopsided," "unmatched," and "uneven." These words suggest that there is a significant difference in the skills or resources of the two parties involved. For instance, if two basketball teams are unevenly matched, it means one team is significantly better than the other, and the outcome of the game is likely to be one-sided. Similarly, if two boxers are unmatched, one might possess superior strength or experience, which makes it hard for the other to compete.