Valentinos Sielis (Greek: Βαλεντίνος Σιέλης; born 1 March 1990) is a Cypriot professional footballer who plays as a centre back for Doxa Katokopias FC.
U13, the first professional team for Doncaster Rovers,[3] Sielis signed with local club of Enosis Neon Thoi Lakatamia FC, and after a great season he moved to Anorthosis Famagusta.
Sielis joined Anorthosis at 15 June 2009 from Enosis Neon Thoi Lakatamia FC as a free agent.
[4] he play as a first time in a European competition on the starting squad in a 1–2 home defeat from CSKA Moscow in Antonis Papadopoulos Stadium for the UEFA Europa League 4th qualifying round.
For the season 2011–12, during the period with coach Stanimir Stoilov, Sielis was a basic player of Anorthosis in the European competitions with 3 appearances in 4 matches, all as a substitution.
It is amazing that in the transmission of reckoning AEL Limassol – Anorthosis from CytaVision, Savvas Kosiaris, some time before the incident with Kaluđerović said that Sielis was a compatible bone marrow transplant donor and his altruism helped a fellow human to stay alive.
The broadcaster of Cytavision who was at the soccer ground, said that Kaluđerović swallowed his tongue and Sielis of Anorthosis had brought him back, when the Cypriot swiftly gave him first aid.