Mental toughness in talented youth tennis players: A comparison between on-court observations and a self-reported measure - Houwer, R.; Kramer, T.; den Hartigh, R.; Kolman, N.; Elferink-Gemser, M.; Huijgen, B. (Journal of Human Kinetics, 2017)
Keywords: youth; junior elite sport; psychic characteristics; performance; tennis; observation; training; competition; performance factor; behaviour; emotion; Germany; sport games; junior sports; social sciences