Fantela began sailing at the age of six. He competed in Optimist class. At the 1998 Cadet World Championships he won bronze medal. Two years later, he won gold medal at the Cadet World Championships. After the early successes in Optimist, he switched to the 470 class with his colleague Igor Marenić. In six junior years in 470, they have won plenty of medals. They have become World Junior Champions on three occasions. They also won silver medal in 2006 and a bronze medal in 2004. At the European Junior Championships, they have won three medals; gold in 2005 and two silver medals. They won gold medal at the 2005 Summer Universiade in Izmir, Turkey. At their first Mediterranean Games they finished 4th. Their first bigger success among the seniors came in 2006 when they finished fifth at the World Championships. One year later, at the 2007 World Championships they finished sixth and earned an Olympic quota place for 2008 Summer Olympics becoming the fourth Croatian crew to qualify for the Olympics in 470 class.
2008 Summer Olympics
Fantela and Marenić were selected to represent Croatia at the 2008 Summer Olympics. At the regatta held in Qingdao International Marina between 11 and 18 August, they have finished ninth overall among 29 crews with 107 net points. They have won tenth race and finished in top 10 on four other occasions. In the medal race, they claimed eight place. Overall, Fantela was pleased with their performance at the 2008 Olympics: "We were hoping for top 10 position and we reached it". At the time, ninth place have been the best Croatian result in 470 at the Olympics.
Senior Breakthrough (2009–2012)
After the post-Olympic break, Fantela and Marenić began their campaign towards 2012 Summer Olympics. They won gold medal at the 2009 European Championships in Traunsee, Austria. They have become the first European Champions in Olympic classes from Croatia since 1978. At the 2009 Mediterranean Games in Pescara they won silver medal. Successes from 2009 were crowned at the 470 World Championships in Rungsted when Fantela and Marenić became first Croatian World Champions in Olympic sailing. In 2010, Fantela and Marenić went on to defend their World title. At the World Championships in The Hague they have won bronze medal though. They finished sixth at the European Championships in Istanbul. At the 2011 European Championships in Helsinki, Fantela and Marenić regained European title in tight competition with British and Israeli crews. 2011 ISAF Sailing World Championships were held at the end of the year in Perth. Fantela and Marenić defended bronze medal from 2010 470 World Championships and secured an Olympic quota place for the 2012 Summer Olympics. At the 2012 Summer Olympics Fantela and Marenić finished in 6th place.
Orders
Order of Danica Hrvatska with face of Franjo Bučar - 2016
