Shi didn't give Ouseph many chances in the second game as he led from start to finish and concluded the match with a hammer from the backcourt.

"It was not an easy win for me," Shi said afterwards. "He gave me quite a few tough challenges."

Shi has won both his encounters with five-time title winner Lin this year, in the final at the All England Open and the final of the Malaysia Open, and has a 4-1 overall head-to-head advantage. But the 22-year-old was humble when asked about the duel.

"It's unavoidable as we were drawn into the same quarter. I will take it as a challenge," Shi said.

Elsewhere, Japanese poster boy Momota claimed an easy win over Wraber of Austria, whose world ranking is 99 places below that of the title favorite. Rio Olympic champion Chen Long knocked out Khosit Phetpradab 21-16, 21-11.

In the women's singles actions, eighth-seeded and title holder Okura needed only 28 minutes to secure a berth in the third round, after eliminating unseeded Rachel Honderich of Canada 21-11, 21-9.

The 23-year-old Japanese star will play Goh Jin Wei of Malaysia in the round of 16. The latter knocked out another Japanese player, 14th seed Aya Ohori to advance.

China's highest-ranked women's singles player Chen Yufei will take on compatriot Chen Xiaoxin in the third round. The two beat Cheung Ngan Yi of Hong Kong and Indonesia's Gregoria Mariska Tunjung respectively in the second round.

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