Chen Tang Jie-Peck Yen Wei pulled one of their biggest career upsets after battling for 55 minutes to overcome Marcus Ellis-Lauren Smith 18-21, 21-11, 21-14 to book their quarter-finals berth at the Hylo Open.

The victory over the tournament third seeds and world number seven pair is Chen-Peck’s best achievement this year, having lost in the opening round in most of their competitions this year.

The world number 49 Malaysians next face Thai pair Supak Jomkoh-Supissara Paewsampran for a place in the semi-finals.

Lee Zii Jia also checked into the last eight after a more straightforward 22-20, 21-16 victory over Irish shuttler Nhat Nguyen.

The Malaysian had laboured in his opening match before squeaking past Spanish veteran Pablo Abian, but looked to be slowly coming into his stride with this victory.

He next faces Thai youngster Kantaphon Wangcharoen for a place in the semis.

Without top shuttlers like Kento Momota, Viktor Axelsen, Anders Antonsen and Anthony Ginting, this tournament represents a high chance for Lee to clinch his second title of the year.

If he beats Kantaphon, the second seed will face either K.Srikanth or Angus Ng Ka Long.

The rest of the national contingent all crashed out in the second round.

Goh Soon Huat-Shevon Lai lost 14-21, 15-21 to Niclas Nohr-Amalie Magelund, while Puttita Supajirakul-Sapsiree Taerattanachai beat Vivian Hoo-Lim Chiew Sien 21-8, 21-6.

Top seeds Dechapol Puavaranukroh-Sapsiree completed Malaysia’s exits in the mixed doubles with a 21-10, 21-19 victory over Hoo Pang Ron-Cheah Yee See.

In the men’s doubles, new pair Tan Wee Kiong-Tan Kian Meng lost 14-21, 18-21 against second seeds Mohammad Ahsan-Hendra Setiawan.