World No 1 Lee Chong Wei bounced back from his first day scare, reasserting a challenge for the All-England Open title and confirming he will try once more for an Olympic gold medal.

The twice former champion from Malaysia reached the quarter-finals with a straight games win over Wang Zhengming, which was very different from the match point crises he had to survive the previous day against Hong Kong's Wang Wing-ki.

"It made me much more focussed," Lee said after his 21-17, 21-19 win over the world No 19 from China.