There is no agreement between interpreters as to whether the verb συναθλέω in Phil. 1.27 and 4.3 presupposes an athletic or a military metaphor. Given that first-century athletes were unlikely to compete as a team, the prefix συν- often puzzles those who interpret συναθλέω as an athletic term, and it is also one of the reasons why others opt for a military background. While the use of the verb alone does not provide any certainty as to the presupposed imagery, in this article I argue that the presence of the prefix συν- does not preclude athletics as a plausible option. Even though team sports were not part of official athletic contests, based on epigraphic evidence I suggest that, in spite of fierce competition, there may have existed a sense of fellowship between ancient athletes in the Roman period. In addition, it is likely that it was enhanced by the existence of a ‘worldwide’ athletic association.