Table 1.

Interview guide for participant interview questions.

Q1	Can you think of examples of past or present players who are/were good returners?
Q2	When you were returning, did you consider contextual information (e.g., score, court side, handedness, wind etc.) to help predict an opponent serve when competing?
Q3	What role did kinematic information (e.g., ball toss, trunk rotation, head position etc.) play in helping you anticipate or predict the serve? Was it more important than the contextual information? Why?
Q4	If you utilized such contextual information how did you update it over the course of a match? For example, how many times did a player have to serve to the same spot on big points before you considered this a trend and adjusted your response accordingly?
Q5	Today, we have asked you to think back to when you played. Now that you’re more involved in coaching, has your thinking or philosophy regarding what factors are important on the return changed at all?
Q6	Given the role of the return in tennis, can you comment on how it is practiced?
Q7	Anything else you would like to add about the return of serve and what we have covered today?