Abstract
Development and optimization of an observational tool for singles tennis. This paper is the result of the development and optimization of the categories system ad hoc for singles tennis that allows a description of the interaction contexts put in play. The complexity associated to a game like tennis, with different levels of interaction between its elements, make the process of selection of the pertinent traits much more difficult in order to build up a taxonomical system. The second step, the optimization of the provisional categorical system, includes a strict control of the quality of data, by the implementation of the previous agreement between observers, firstly, and the generalizability theory, secondly.
