Ong Yew Sin-Teo Ee Yi sprang a surprise when they beat world no.3 doubles pair Mathias Boe-Carsten Mogensen from Denmark to progress to the second round of the Celcom Axiata 2018 Malaysian Open Championship on Tuesday.

The Malaysian doubles pair won the deciding set 21-13 after taking the first set 21-17 and losing the second 18-21 at the Axiata Arena in Bukit Jalil, Kuala Lumpur.

Teo, when approached by reporters, said he did not expect his partnership with Ong to be able to beat the world's top pair despite playing as an unseeded pair in the championship.

"Playing on home ground and with support from the spectators raised our confidence level to win the match,”he said after the encounter.

The national men's top pair of Goh V Shem-Tan Wee Kiong also qualified for the second round after defeating defeated Tinn Isriyanet-Kittisak Namdash from Thailand 21-15, 21-10 in 30 minutes.

Also reaching the second round were Aaron Chia-Wooi Yik Soh who beat the US pair of Philip Chew-Ryan Chew 21-16, 21-15.

In the men's singles, Lee Chong Wei eased into the second round after beating Japanese shuttler Kazumasa Sakai and will next play Lee Hyun Il of South Korea.

"I'm happy with today's performance [because] the first round of any tournament is not easy as young players or non-seeded players are more energetic and they can often spring up a surprise, so I need to focus on getting points quickly," said Lee, who has won the Malaysian Open 11 times.

"Now, young players are my main challenge. Playing at home, I have to perform better in front of the fans. I hope in the next game I can do even better."

Meanwhile, young women’s singles player Goh Jin Wei beat Pai Yu Po from Taiwan 21-13, 21-17, and will either face South Korea's Sung Ji Hyun or Indonesia’s Fitriani.

However, luck was not on the Malaysian mixed doubles team's side as Chan Peng Soon-Goh Liu Ying, Goh Soon Huat-Shevon Lai and an Kian Meng-Lai Pei Jing were all eliminated in the first round.