STATS (formerly Prozone) post-match player tracking methodology has been independently validated by leading academics and practitioners throughout Europe. Consequently, STATS post-match methodology represents the most accurate and repeatable player tracking system available in the industry.
“STATS [Prozone] serves as a highly accurate system for quantifying match-related displacement velocities in soccer”
Di Salvo, V., Collins, A., McNeil, B. and Cardinale, M. (2006). Validation of Prozone: A new video-based performance analysis system. International Journal of Performance Analysis in Sport, 6 (1), pp. 108-119