Ko Sung-hyun
In early 2013, Widjaja started her partnership with the 2012 World junior champion, Edi Subaktiar. The duo competed at the 2013 Asian Championships, but lost to South Korean pair Ko Sung-hyun and Kim Ha-na in the first round. At the 2013 Indonesia Open Grand Prix Gold, they failed to advance to the final stage, had upset by the six seeded Praveen Jordan and Vita Marissa in the semifinal.