Viktor Axelsen reached the men's singles quarter-finals ©Getty Images

Denmark's Viktor Axelsen and Spain's Carolina Marin continued their pursuit of back-to-back titles on the Badminton World Federation (BWF) WorldTour circuit by reaching the quarter-finals of the Toyota Thailand Open.

Both Axelsen and Marin had won the men’s and women’s singles events respectively, at last week’s Yonex Thailand Open, another BWF Super 1000 competition.

Axelsen eased into the men’s quarter-finals today by earning a 21-11, 21-13 win over Thailand’s Kunlavut Vitidsarn at the Impact Arena.

His reward will be a match against Malaysia’s Liew Daran, who overcame India’s HS Prannoy 21-17, 21-18.

Chou Tien-chen, the top seeded player in the draw, earned a straight games 21-19, 21-16 victory over France’s Brice Leverdez.

The result saw Chou set-up an all-Chinese Taipei quarter-final with Wang Tzu-wei, who was a 21-13, 21-11 winner against Angus Ng Ka Long of Hong Kong.

Denmark’s Anders Antonsen received a bye into the quarter-final stage of the competition, after India’s Srikanth Kidambi was forced to self-isolate after his roommate tested positive for COVID-19.

India’s Sameer Verma will face Antonsen in the last eight, after he earned a 21-12, 21-9 win over Denmark’s Rasmus Gemke.

Hans-Kristian Vittinghus of Denmark and Hong Kong’s Lee Cheuk Yiu complete the quarter-final line-up.

Vittinghus battled to an 11-21, 21-15, 21-17 win over Indonesia’s Shesar Hiren Rhustavito, while Lee was a 21-19, 13-21, 21-12 winner against Indonesia’s Anthony Sinisuka Ginting.

The women’s singles competition saw Marin maintain her impressive form, with the reigning Olympic champion winning 21-19, 21-16 against Denmark’s Line Kjærsfeldt.

Marin will face Turkey’s Neslihan Yigit in the last eight, following her 21-19, 20-22, 21-14 victory over Germany’s Yvonne Li.

Tai Tzu-ying, who was beaten by Marin in last week’s final, also progressed to the last eight today.

The Chinese Taipei star and top seed recorded a 22-20, 21-16 win over Indonesia’s Gregoria Mariska Tunjung.

Canada’s Michelle Li will be her quarter-final opponent, following her 21-17, 21-18 victory over the United States’ Iris Wang.

Thailand’s Ratchanok Intanon and India’s PV Sindhu will meet in a high-profile quarter-final clash.

Intanon, the 2013 world champion, battled past South Korea’s Sung Ji-Hyun 19-21, 24-22, 21-17.

Reigning world champion Sindhu secured a comfortable 21-10, 21-12 win over Malaysia’s Kisona Selvadurary.

The quarter-final line-up is completed by South Korea’s An Se-young and Thailand’s Pornpawee Chochuwong.

An overcame Singapore’s Yeo Jia Min 21-15, 21-7, while Chochuwong beat her Thailand team-mate Benyapa Aimsaard 21-18, 21-14.