(171002) -- BELGRADE, Oct. 2, 2017 (Xinhua) -- Visiting Greek President Prokopis Pavlopoulos (L) shakes hands with his Serbian counterpart Aleksandar Vucic at a joint press conference in Belgrade, Serbia, Oct. 2, 2017. Greece will support Serbia as well as all other Balkan countries who wish to become part of the European Union (EU), but these countries must respect international right, as well as European principles and heritage, said Greek President Prokopis Pavlopoulos during his visit to Serbia on Monday. (Xinhua/Nemanja Cabric)