Figure 2. Serving round: usage rates of “placement→technique” combinations in training matches and international competitions. * denotes adjusted p < 0.05; ** denotes adjusted p < 0.01; *** denotes adjusted p < 0.001. The following text is the same. Regarding the interpretation of “placement→technique” combinations, e.g., “sm→TS” means the target player placed the ball to the middle short location, and the opponent used a touch short technique in return. Other combinations are interpreted similarly. SP represents a composite of several techniques that rarely occur in matches and is therefore not subjected to further detailed analysis. The same applies to the subsequent figures.