Hotta, S., Murakami, K. , Hirata, D., Horiuchi, S., Takeda, M. and Hioki, K. 2023. The impact of the changes made to the men’s professional tennis tour system: A case study of Japanese players. ITF Coaching & Sport Science Review . 31, 91 (Dec. 2023), 26–31. DOI:https://doi.org/10.52383/itfcoaching.v32i91.335.