[1] He made his debut in European competitions during a 2009–10 Europa League qualifier against KR Reykjavík from Iceland.
[2] He was the youngest Greek player to ever play in a European match, being 16 years 7 months and 22 days old.
[3] On 29 June 2016, Siatravanis signed for Football League club Apollon Smyrnis on a one-year contract.
[4] On 15 December 2016, he scored a hat-trick against Panathinaikos in the Greek Cup.The game ended in 4–3 loss and Apollon Smyrni was eliminated from the next round.
On 8 June 2017 the team's administration extended his contract for another year, acknowledging his contribution.