Pedzisa mutsara unotevera: Petersen akaumba nhoroondo yake yokushambira pa1999 Pan Pacific Swimming Championships muSydney, kwaakava wechina mumakwikwi e100 m breaststroke, achingova nechidimbu chiduku kunze kwepodiyamu. Mugore rimwe chetero, Petersen akahwina menduru yegoridhe yeSouth Africa mumakwikwi emamita 100 (1:02.63) kuSouth Africa.
Mitambo yeAfrica yose muJohannesburg.