Purpose The authors first examine the extent to which having an accurate understanding of and anticipate on one another’s work routines (defined as crossattuning) explains additional variance of team performance above and beyond other implicit coordination concepts such as team familiarity and transactive memory. Furthermore, the authors aim to propose that social sensitivity interacts with team size and team longevity in supporting the emergence of cross-attuning. Design/methodology/approach The authors first use a quasi-experimental design with 35 student-teams in Study 1 to test the discriminant validity of their construct. In Study 2, the authors use a field study with 66 work teams to test their hypotheses. Findings Study 1 shows that cross-attuning has a positive effect on team performance and that it explains additional variance above other implicit coordination-concepts. In Study 2, the authors confirm cross-attuning associates with supervisor-rated team performance and find that team social sensitivity is more positively related to cross-attuning in small teams with low longevity and in large teams with high longevity in comparison to large teams with low longevity. Originality/value The study of implicit coordination mechanisms in teams has primarily focused on having knowledge about other team members’ expertise and competencies and how teams cope with unexpected events. How teams deal with individual work routines – repetitive work-related behavior that is limited in considering alternative actions and the task environment – have received limited attention, despite the potential of these individual routines to thwart successful team task completion.