This study examines the role of within-team competition (i.e. team hypercompetition and team development competition) in a team process. We developed and tested a model that associates team collectivism as the antecedent of within-team competition, and knowledge sharing and team flexibility as the outcomes. The model was empirically tested with data from 141 knowledge-intensive teams. The empirical findings showed that team collectivism had a positive relationship with team development competition and a negative relationship with team hypercompetition. Regarding the outcomes, team development competition and team hypercompetition had an indirect relationship with knowledge sharing and team flexibility through team empowerment. We offer a number of original contributions to the team effectiveness literature, especially by showing that team hypercompetition and team development competition have different impacts on team knowledge sharing and team flexibility.