Caroline Wozniacki confessed she is still haunted by an Australian Open semi-final loss to Li Na in 2011 after reaching the last four for the first time since that agonising defeat.
Wozniacki progressed beyond the quarter-final stage of the first major of the year for a second time in the early hours of Wednesday morning, beating Carla Suarez Navarro 6-0 6-7 (3-7) 6-2 on Rod Laver Arena.
Elise Mertens stands in the way of the former world number one and a maiden final at Melbourne Park as she eyes an elusive first grand slam title.
Li saved a match point before coming from a set down to beat Wozniacki seven years ago and Wozniacki said that remains the most painful defeat of her career.
"It feels great to be back here in the semi-finals." said the Dane. "It's been a few years. Last time I was in the semi-finals here, I had match point against Li Na and I lost it.
"That's still haunting me till this day, so I'm hoping for a different result this time."
She added: "That's one that really hurt. I've lost from match points up and won from match points down before. That one was a special one."
Jana Fett will know how Wozniacki feels, having led the second seed 5-1 in the final set and had two match points in their round-two clash last week, the WTA Finals champion hauling herself off the ropes to complete a great escape
Wozniacki was taken to a third set by Suarez Navarro after failing to win a match point in the second set and the world number two said being so close to defeat against Fett helped her to see off the Spaniard at in the last eight.
"I think that's one thing that kind of helped me resetting into the third set. I was like, 'You know what, I shouldn't really be here. I still have the chance to play myself into the semi-finals. Just stay positive and go for it'. That's really what I was thinking," said Wozniacki.
"That was a crazy comeback. Now everything that I do is just a plus."
|Deja vu for Enisei as La Rochelle inflict another thrashing|
|Five-star Jovic makes Bundesliga history|
|Liverpool´s scoring slump no concern for cautious Klopp|
|He´s the Special One - Sarri insists he is not on Mourinho´s level yet|
|Second-half blitz guides Leicester to European success|
|Sheffield Wednesday 1 Middlesbrough 2: Besic, Assombalonga see off Owls|
|Goerges rallies to reach Luxembourg Open final, Jabeur makes history|
|Howe: Transfer speculation will not disrupt Ake|
|´Do we really want opera every night?´ - Klopp not changing Nations League view|
|Vile and abhorrent – Chelsea´s Carney responds to online abuse|
|Giants WR Beckham Jr. explains why he might cramp up: ´I really don´t like water´|
|Man City pay training-pitch tribute to Joe Hart|
|Neymar to be rested as Tuchel rubbishes Ballon d´Or concerns|
|Sarri ´not interested´ in Christensen father´s quit threat|
|Cardinals fire offensive coordinator McCoy after 1-6 start|
|Neymar return unlikely, but anything can happen – Valverde|
|Bairstow a doubt for fourth ODI|
|Manchester United fined for late arrival and delayed kick-off against Valencia|
|Australia-Pakistan chat not ´especially polite´ - Sarfraz|
|Pogba relishing ´pressure game´ against in-form Hazard|
|Don´t bet on Cardiff survival, warns Warnock|
|Buffon enjoying Tuchel´s methods at PSG|
|RIP to Wimbledon epics! Isner feels like The Undertaker following final-set tie-break rule|
|Sevilla performance sealed Bernat´s Bayern exit - Hoeness|
|Keita set to miss out as Liverpool monitor injured stars|
|He didn´t want to be here – Guardiola doubts Sancho will return to Manchester City|
|Sarri: Manchester United are the best in the Premier League|
|Mourinho salutes ´brave´ Shaw for ´best possible´ response to criticism|
|No Ballon d´Or distractions for Griezmann, insists Simeone|
|Wigan stand by Hardaker as full-back prepares to undergo rehabilitation|
|Barcelona deny Neymar talk|
|Hazard can win the Ballon d´Or as a Chelsea player, insists Sarri|
|De Bruyne in contention to start in Manchester City´s clash with Burnley|
|Neymar needs to mature to reach Messi levels - Xavi|
|We have a hell of a lot to do - Paine slams Australia batting|
|Kerber and Osaka to meet at WTA Finals|
|Lorenzo out of Japanese MotoGP|
|Real Madrid handed Africa trip in Copa del Rey|
|Allegri: Ronaldo has sharpened Juventus focus|
|No Wade in Wasps squad amid NFL reports|
|Rooney: Five of us controlled Man United dressing room|
|Bayern bosses launch scathing attack on ´disrespectful´ media|
|Saints lock in Lawes to new deal|
|Adelaide United 1 Sydney 1: Debutant Le Fondre rescues a point|
|Madrid can´t look back, only forward - Lopetegui confident of revival|
|Wimbledon to introduce final-set tie-breaks|
|Abbas inspires Pakistan to series victory|
|Madrid boss Lopetegui hopeful on Bale availability|
|Mood is positive at Bayern, insists under-pressure Kovac|
|LeBron offers food for thought after losing Lakers debut|
|Bolt future not an immediate concern for Mariners|
|Hazard: I could finish my career at Chelsea|
|Buffon hoping to avoid Champions League final against Juventus|
|Wilshere not ready for West Ham return|
|Chelsea v Manchester United: Hazard better under Sarri than he ever was with Mourinho|
|The big Friday Premier League quiz|
|Khawaja suffers meniscal tear, doubt for India series|
|Babbel: Klopp must win trophies now at Liverpool|
|LeBron makes spectacular start on Lakers debut, but LA fall to Trail Blazers|
|Broncos thrash Cardinals to end losing streak|
|Price leads Red Sox past Astros and into World Series|
|LeBron makes fast start on Lakers debut with two massive dunks|
|Real Salt Lake 4 New England Revolution 1: Hosts boost play-off chances|
|Simmons gets triple-double in win over Bulls|
|´Ambitious´ Maguire wants Champions League football|
|Henry praises ´charismatic leader´ Falcao|
|WATCH: Cardinals WR Fitzgerald tackles former QB Warner on sidelines|
|Spurs right not to make signings – Pochettino|
|Icardi happy at Inter, close to contract renewal|
|This Week in U.S. Sports: Bosa leaves Ohio State while the World Series is almost set|