Sotirios Papagiannopoulos (Greek: Σωτήριος Παπαγιαννόπουλος; born 5 September 1990) is a Swedish professional footballer who plays as a centre back for Copenhagen.
Papagiannopoulos’ playing career began in the youth system of AIK. He played for the club’s U-19 team before making the switch to his first professional senior side in Väsby United. His defensive abilities and goal-scoring prowess saw him continue to raise eyebrows. His coach had said: "If he works hard, he can be a very good player". After two years on Väsby's squad, Papagiannopoulos signed for Akropolis IF on loan. He was a basic toll for his new team and participated in 24 matches. Assyriska FF came calling in 2011 and Papagiannopoulos began a four-year stint with the Swedish second division club. He made 75 appearances for the team in those four seasons producing consistent and steady performances at the back for his team. "He has a great season with Acropolis, being the captain of the club. We have followed his progress for years, he is aggressive, fast, has good passing game. He was a high priority for us and it feels good that he chose us in front of several other competing clubs." said Assyriska manager Aydin Aho to the club's website. He made very good appearances with Assyriska FF and participated in 82 matches, in all competitions.