World number one Lee Chong Wei put on a less than stellar performance to beat Denmark's Jan O Jorgensen to top Group A at the BWF World Superseries Final on Friday.
The Malaysian, who is chasing a record fourth Superseries title, but his first since 2010, edged the fighting Dane 23-21, 24-22 in 50 minutes before declaring: "I'm ready to meet anyone in the semi-finals".
"I didn't go all out today as I wanted to conserve some energy for tomorrow's semi-finals," said Lee who has not dropped a set all tournament.
"Both of us already qualified for the semis and it didn't matter who won. Obviously, I hate to lose on my home ground, so I did try little harder when it mattered," he added.
Lee, who has taken six Superseries titles this year, controlled the first game against Jorgensen and led 11-6 at the interval.
He moved his opponent round the court and won numerous points with delicate drop shots, some of which clipped the net before falling in.
Jorgensen trailed all the way before finally taking the lead at 21-20. But he failed to capitalise on the advantage as Chong Wei won the next three points.
The second game was a different story as Jorgensen, now playing with a slight draft to his back, fought back to lead 11-8 at the interval.
He moved further ahead to 15-11, before Lee shifted into fifth gear to level at 16.
They then traded points and once again Jorgensen threw away game point at 22-21 to lose 24-22.
In Group B, Kenichi Tago of Japan and Indonesia's Tommy Sugiarto were gifted their tickets to the semi-finals when another Indonesian, Sony Dwi Kuncoro, pulled out after aggravating an old leg injury while coming down from the team bus.
Meanwhile, three-time champions Mathias Boe and Carsten Mogensen scraped into the semi-finals of the men's doubles when Hiroyuki Endo and Kenichi Hayakawa lost 21-13, 21-17 to South Korea's Ko Sung-Hyun and Lee Yong-Dae.
All three pairs finished with a win and a defeat. They were also level on games won and lost (2-2) but Ko-Lee took top spot by as they won 77 points and conceded 72 while the Danes finished on 75-77 and the Japanese on 72-75.
The $500,000 season-ender brings together the top eight performers in each of the five categories based on points earned from the 12 Superseries tournaments.