“…Moreover, in order to undergo the volume and intensity of training necessary, expert performers must possess various psychological qualities related to motivation, mental toughness, self-regulation, and emotional regulation (Jonker, Elferink-Gemser, & Visscher, 2010;Chu, Chen, Chen, Huang, & Hung, 2012;Lopez & Santelices, 2012). These psychological variables were selected, because they are likely to help junior players to develop into elite players at senior level (Faber, 2016;Gucciardi, Hanton, Gordon, Mallett, & Temby, 2015). Junior table tennis players are confronted with a series of demands during their career and their competitive season such as a demanding training schedule or intense competitive environment (Martinent, Decret, Guillet-Descas, & Isoard-Gautheur, 2014).…”