Panagiotis Retsos is a Greek centre-back and Olympiacos captain. After coming through Olympiacos, he moved to Bayer Leverkusen in 2017 and later had spells with Sheffield United, Saint-Etienne and Hellas Verona before returning to Olympiacos. He has represented Greece since 2017 and was part of Olympiacos' 2023-24 UEFA Conference League-winning squad.