Navratil won the 2007 PDC World East European Qualifying Event beating fellow countryman Petr Tous in the final. It earned him a place in the 2008 PDC World Darts Championship. He defeated Filipino Rizal Barellano 5-0 in the preliminary round and faced Andy Jenkins in the first round, eventually losing 3-2. He earned £4,000 for his efforts, but since then he has only managed to earn £325 over nine tournaments. He failed to qualify for the inaugural European Darts Championship and also failed to qualify for the 2009 PDC World Darts Championship.