“…The initial objective of this system was to assist line judges, but as it has recently become used for player tracking and postmatch analysis, there are a number of papers using Hawk-Eye data . In addition, instruments for tracking of the ball and players, such as Trackman (Trackman Inc.) and PlaySight (PlaySight Interactive ltd.), have been developed, and studies using such instruments are being conducted (Edelmann-Nusser et al, 2019;Murata and Takahashi, 2020;Kashiwagi et al, 2021).…”