Aruna produced one of the shock results on the opening day of main draw action at the Eriksdalshallen sport complex as he beat Wong 11-7, 11-4, 11-8, 6-11, 2-11, 11-6.

"Early in the match he made mistakes; after the third game the match changed, he stopped missing, stopped making errors," the unseeded Nigerian said. 

"I was fine receiving service; from the start of the fourth game, he served short most of the time. 

"He won the fourth and fifth games, in the sixth game I was down 0-5; I just kept fighting, fighting and fighting."

Benedikt Duda of Germany was also victorious over a seeded player as he proved too strong for Japan’s Yuya Oshima.

Duda prevailed in six games as he recorded a 13-11, 10-12, 11-6, 11-8, 10-12, 11-6 win over the 14th seed.

The German's reward is a meeting with World Championships silver medallist and top seed Fan Zhendong of China, who booked his place in round two with a comfortable 11-1, 11-6, 11-3, 11-9 victory against South Korea's Jang Woo-jin.

The top seed in the women's tournament also enjoyed serene progress into the next round as reigning Olympic and world champion Ding Ding of China dispatched Sofia Polcanova of Austria in straight games.

The Rio 2016 gold medallist was in fine form in the opening round encounter and claimed a straightforward 11-7, 11-5, 11-3, 11-4 success.

Chinese Taipei’s Cheng I-Ching, the seventh seed, was made to work harder for her place in round two as she fought back from two games down to oust China's Li Jiayi 5-11, 5-11, 11-9, 12-14, 11-5, 11-2, 11-8.

The tournament in the Swedish capital continues tomorrow.