Yeo, however, was not able to pull off an upset against world number 1 and defending champion An Se-young.
The 23-year-old, who won four consecutive Badminton World Federation Tour titles prior to the tournament in Singapore, took the match 21-14, 21-13 in 41 minutes.
World number 11 Yeo kept pace with the reigning women’s singles Olympic and world champion early on in the first game, before the South Korean pulled away. But with An shifting into a higher gear in the second, Yeo went into the interval 6-11 behind and could not peg the top seed back.
“She was able to be quite quick on her feet, and her shots were pressuring me quite a bit,” said Yeo.
“Throughout the match, I just on and off played many unforced errors which very quickly widened the gap. That gave me more pressure, because she barely made any mistakes.”
Yeo saw off world number 12 Busanan Ongbamrungphan 21-14, 21-13 in the round of 32 on Tuesday.
Her compatriot Loh, meanwhile, was stretched to three games by rising star Alex Lanier, but beat the 20-year-old European champion in a 60-minute contest.
