The Dane held match points against the Chinese great on her only previous appearance in the last four at Melbourne Park.
“That’s the one that really hurt,” Wozniacki said after reaching a semi-final again early Wednesday with a three-set victory over Spain’s gritty 39th-ranked Carla Suarez Navarro.
“I had match points against Li Na. I lost it. That’s still haunting me to this day. So I’m hoping for a different result this time.”
Wozniacki will face unseeded Belgian debutant Elise Mertens on Thursday for a place in Saturday’s final, but seven years on she remembers her meltdown against Li like it was yesterday. “I remember serving for it at 5-4 in the second set. I remember being up 3-1 in the second set, serving with the sun,” she recalled.
Wozniacki was the top seed that year having risen to number one in the world in 2010 and she said the defeat was crushing