Rubuta ci gaba don wannan sakin layi - Petersen ya ci gaba da gasar Afirka ta Kudu a 2011 don cancanta ga gasar cin kofin duniya ta PDC ta 2012
, inda ya shawo kan José Oliveira de Sousa 4<unk>3 (ƙafafun) a zagaye na farko don isa ƙarshen 64 na shekara ta biyu a jere. Petersen ya buga Steve Brown a zagaye na farko kuma ya dawo daga 2<unk>1 a cikin saiti don cin nasara 3<unk>2, kuma ya dawo daga 2<unk>0 a cikin kafafu a cikin yanke shawara kuma ya tsira daga dart daya. Petersen ya ce bayan nasarar cewa "mafarki ne ya zama gaskiya" kuma yana da tabbacin cewa yana da ƙari a cikinsa. Ya buga Gary Anderson a zagaye na biyu kuma ya buga mafi kyawunsa a gaban kyamarorin talabijin. Koyaya, ajin abokin hamayyarsa ya zo kuma ya yi asara 4<unk>2, tare da Anderson yana bayyana bayan wasan cewa "Devon ya zama mai wahala a gare ni". Petersen da kansa ya ce zai "yi aiki tuƙuru kuma ya dawo mafi kyawun ɗan wasa".