Diamantidis also won several individual trophies with Panathinaikos, such as: the EuroLeague MVP in 2011, the EuroLeague Final Four MVP twice (2007, 2011), the EuroLeague Best Defender six times (2005, 2006, 2007, 2008, 2009, 2011), five of his six total Greek League MVP awards (2006, 2007, 2008, 2011, 2014), the Greek League Finals MVP six times (2006, 2007, 2008, 2009, 2011, 2014), and the MVP of the Greek Cup in 2009 and 2016. While he was a member of Panathinaikos, Diamantidis was also named the 2007 Mister Europa, and the 2007 Greek Athlete of the Year.