Related Clues:

• Nikola Tesla, ethnically
• Serb’s neighbor
• Eastern European such as soccer's Luka Modric
• Adriatic coast resident
• European king dressed for cold weather?
• Slavic native
• European rival somehow has caught up
• Native of Belgrade, say
• Russian, Pole or Serb, for example
• Serb, Slovene or Slovak
• Bulgarian or Pole
• Neighbor of a Kosovar
• One from an independent republic that was part of Yugoslavia
• Basketball's Nikola Jokic, e.g
• One may live in Belgrade