Rubuta ci gaba don wannan sakin layi - Tsalmpouris ya kasance memba na 'yan wasan matasa na Girka. Tare da 'yan wasan matasa na Girka, ya buga wasanni masu zuwa: 2012 FIBA Turai Under-16 Championship, 2014 FIBA Turai Under-18 Championship, 2015 FIBA karkashin-19 gasar cin kofin duniya
, 2015 FIBA Turai Under-20 Championship, da 2016 FIBA Turai Under-20 Championship Division B, inda ya lashe lambar tagulla.