Mezue ahịrịokwu na-esonụ: Petersen jidere South African Open na 2011 iji ruo eruo maka
2012 PDC World Darts Championship, ebe o meriri José Oliveira de Sousa 4<unk>3 (ụkwụ) na agba nke mbụ iji ruo 64 ikpeazụ maka afọ nke abụọ. Petersen gbara Steve Brown n'agba nke mbụ ma nwetaghachi site na 2<unk>1 gbadata na setị iji merie 3<unk>2, na-agbakwa site na 2<unk>0 gbadata na ụkwụ na mkpebi mkpebi na ịlanarị otu egwuregwu dart. Petersen kwuru mgbe mmeri ahụ gachara na ọ bụ "nrọ mezuru" na o kwenyesiri ike na o nwere ihe ọzọ n'ime ya. O meriri Gary Anderson na agba nke abụọ ma mee nke kachasị mma o nwere n'ihu igwe onyonyo. Agbanyeghị, klas nke onye iro ya bịara wee tufuo 4<unk>2, ebe Anderson kwuru mgbe egwuregwu ahụ gasịrị na "Devon ghọrọ ihe siri ike nye m". Petersen n'onwe ya kwuru na ya ga "na-arụsi ọrụ ike ma lọta dị ka onye ọkpụkpọ ka mma".