The 18 year old center, comes from Megara and was honored at a special event for winning the Gold Eurobasket U18 at Volos. Papagiannis in his speech thanked his family, his teachers and his agent, and at the end he said:
"The last two years I play for the biggest club in Europe, Panathinaikos. It was one of my dreams, I wanted to achieve since childhood. I always saw Panathinaikos when I was growing up. We grew up with Diamantidis and Spanoulis and added:
"The gold was a dream comes true in the summer. I expect with my team to live such moments”.