Abstract: The invention relates to a system for collecting and processing data associated with players playing a ball game, where the ball comprises at least one RFID transmitter in the form of a passive RFID tag. For every player, an active RFID radio frequency sensor is worn on every limb authorized to come into contact with the ball, said RFID sensor being able to measure the instantaneous distance between the RFID sensor and the RFID transmitter from the strength of the radio frequency signal received from the RFID transmitter. An accelerometer measures the instantaneous acceleration of said limb. A microprocessor and a memory are used for time-stamping and storing the measurements output by the RFID sensor and the accelerometer for the purpose of post-processing. A central processing unit runs a program configured to read and process the data recorded in the memory units worn by the players and to deduce therefrom data representative of certain physical or technical information related to the play of the players.