Date of birth: 29.01.1985.

Place: Sombor

Country: Serbia

Height: 195 cm

Position: quarterback

Before water polo, he was playing football, karate, hockey and folklore.
He began playing water polo when he was eleven (11) for water polo team Vojvodina in Novi Sad. Besides Vojvodina, he also played for Partizan, Hios, Crvena zvezda, Olympiakos. Currently he plays for Romanian water polo team Oradea from Oradea.
Nikola Radjen is one of the best Serbian water polo players and winner of many trophies. Some of them are:

– World Championship 2009 gold medal, 2011 silver medal

– European Championship 2012 and 2014 gold medal, 2008 silver medal, 2010 bronze medal

– Olympic games 2008 and 2012 bronze medal

– World League 2008, 2010, 2011, 2013, 2014 gold medal, 2009 bronze medal

– World Cup 2010 gold medal

– Mediterranean games: 2005 bronze medal, 2009 gold medal

– Universiade 2005 gold medal