However, the duo can consider themselves lucky to be participating in the event as they were called up as replacements for Guatemala's Solis Jonathan and Nikte Alejandra Sotomayor, who withdrew from the tournament.
Having failed to get past the early stages at four previous World Championships, Liu Ying is determined to engineer a change in fortunes this time around, starting with the draw where she is hopeful of avoiding a match-up with a seeded pair in the
"Being unseeded, there is a danger of facing seeded pairs in the early rounds," she told The Star. "We are keeping our fingers crossed that the draw will be kind to us."
The 26-year-old was forced to miss the 2014 World Championships last August after undergoing surgery on both of her knees, an operation that resulted in nearly eight months on the sidelines. Since her return, Liu Ying has teamed up with Peng Soon to win the Polish Open in March and last week's Russian Open.
This injury lay-off is a driving force for Liu Ying as she prepares for the World Championships.
"I was in crutches after undergoing surgeries on both my knees last year," she said. "I had to miss the World Championships (in Copenhagen in August).
"After a few months back on my feet, Peng Soon and I have now made it to our fifth World Championships."