Purpose: This study aimed at deciding the weights of 3-level measures that have been constructed in literature to evaluate tennis player performance. Methods: The fuzzy theory and the Delphi method were employed to calculate and integrate the opinions of six tennis experts. Results: As results, the「training input」and「serve technique and achievement」measures in the second level receive most attentions. In the third level, the「coach number」,「training plan」,「unforced error」and「winning rate of 1st serve」measures receive most attentions. Conclusion: From the above findings, it was reasoned that the performance of tennis player should be enhanced from these measures.