Though the interaction of team members in sport has already been considered when analysing team
expertise and performance, there is no comparable research addressing the interplay of referee teams as part of
their expertise. Based on lab-based research on coordinated gaze behaviour, we assumed that orchestrating
referees’ gaze is an important way of improving referee performances. To first scrutinize if handball referees
coordinate their gaze, the gaze fixations of a handball referee team was analysed while they were presiding over a
game. Results showed that referees mostly fixated the same aspects of game action (75%) and behaved
differently as stated in existing guidelines for refereeing in handball. That is, the current results indicate that
handball referees’ coordination of gaze behaviour seems far from optimal (they focused on the same aspects of
game action too often) and should be considered when thinking about avenues to performance improvement.
Furthermore, we tried to discuss potentials and limitations of the current research approach for future studies
that seem necessary to gain more insight into the expertise interplay of referees.