Rubuta ci gaba don wannan sakin layi - Plekanec ya taka leda a wasanni uku na kasa da kasa na kasa da kasa tare da Jamhuriyar Czech. An kira shi zuwa kungiyar 'yan kasa da shekaru 18 a gasar zakarun duniya ta 2000 ta IIHF, inda ya ba da maki biyu a wasanni shida. Daga nan ya taimaka wa Czech zuwa lambar zinare a gasar zakarun duniya ta 2001 tare da maki biyu a wasanni bakwai. Ya yi karo na biyu a jere a gasar Junior ta Duniya a 2002
kuma ya inganta zuwa maki bakwai a wasanni bakwai.