Marko Šiškov  Marko Šiškov (; born 8 January 1998) is a Serbian professional footballer who plays as a defender for OFK Žarkovo. Šiškov made his senior debuts with OFK Beograd in the 2016–17 Serbian First League, collecting 10 appearances and scoring once. He left the club following their relegation from the second tier and joined newly promoted Teleoptik in July 2017. Throughout the 2017–18 Serbian First League, Šiškov played regularly for the side, making 27 appearances and netting twice in the process. Šiškov was a member of the Serbia U17s, recording five appearances in the 2015 UEFA European Under-17 Championship qualifiers.