Career
He has also competed at six consecutive South Carolina European Championships (Trieste 2005, Helsinki 2006, Debrecen 2007, Rijeka 2008, Istanbul 2009 and Eindhoven 2010, he also competed at Chartres 2012, Herning 2013), as well as the University Games in Bangkok in 2007 and Belgrade 2009. He swims for Serbian Club P.K. Vojvodina, but he also competes for Swedish club South.K. Neptun. A year later the team took 3rd place overall and Radovan picked up two bronze medals and again five golds in the relays.
At the 2008 European Championships (South Carolina) in Rijeka he made the final in the Men"s 200m Freestyle, after which he placed 8th, also adding a semi-final place in the 50 m freestyle.
At the next two European Championships he made semi-finals in the 100 m and 50 m freestyle. Siljevski holds the national record at 200 m Freestyle for Serbia in Short Course pools.
At the 2008 Olympic Games he placed 40th, winning a third place in his Qualification group.