The phrase "went one on one" is often used to describe a one-on-one competition or interaction between two individuals. However, when searching for antonyms for this phrase, we can look at cooperative or collaborative terms. Rather than competing against each other, individuals could work together in a cooperative or collaborative effort. Some antonyms might include: collaborated, cooperated, worked together, partnered, or united. Overall, while competing one-on-one can be beneficial in certain situations, it is important to remember that working together can often lead to greater success and achievement as a team.