Reigning World Champions Chen Long and Carolina Marin head to the Jakarta for the defense of their titles with contrasting approaches.
The two world number ones head to the Indonesian capital as the top seeds and favourites to win the title but while Chen has been a class apart since winning his first world title in Copenhagen, Marin has struggled with injuries.
Chen has won four major events since winning his maiden world title in 2014, where he beat then-world number one Lee Chong Wei.
"It just gave me really a lot of confidence," the Chinese superstar told reporters in Jakarta via a translator. "I really hope to get my second singles world championship this year."
Chen has been placed in the opposite half of the draw to Wei and his ever-popular compatriot Lin Dan, and is expected to ease into the last eight with little effort.
Marin, on the other hand, has been involved in a titanic battle with Indian ace Saina Nehwal for the top spot on the world rankings and heads to Jakarta still recovering from the foot injury she suffered a month ago.
A winner of three titles this year, the Spaniard admitted that she felt "better than before" but remained hesitant to talk up her chances of retaining the title.
"I don't want to think about defending the title from last year," she said. "I just want to enjoy the competition and do my best."
In her previous visit to Jakarta in June, Marin was knocked out of the first round of the Indonesian Open.