The Australian tennis star's aspirations of advancing to the ATP Finals last four are hanging by a thread after a heartbreaking defeat in three sets to Lorenzo Musetti.
The seventh-ranked player succumbed 7-5 3-6 7-5 after failing to serve out the match, keeping the Italian to stay alive in the event and now forcing the Australian requiring to decisively defeat Taylor Fritz in his third and final group match to reach the semi-finals.
But confronting Fritz in two days' time is the smallest of de Minaur's pressing worries as the Sydneysider admits he must address the psychological barriers that threaten to cruel his career.
A loser of all six of his grand slam quarter-final appearances, the twenty-six-year-old was unable to disguise his anguish after suffering yet another high-stakes near miss with his tournament fate in his own hands.
"I'm uncertain how many times I can deal with a loss like this one," de Minaur said in Turin. "I just have to talk to my team and try to sort out these issues because these are issues that cannot continue occurring."
"I mean, if I truly desire to be genuine about taking the next step in my career, these contests, I must win them. I just can't. It feels like I've lost a lot of them this year. Most importantly, it's getting to a point where psychologically it's killing me."
Characterizing his feelings as "very bleak", de Minaur lamented a succession of third-set slip-ups in 2025 and said he must find a way to win the tight encounters.
The top-ranked Australian's streak of devastating defeats comprise:
"I keep putting everything into these matches," de Minaur commented. "When the outcome isn't positive, it's difficult to keep persevering."
"It's something that if it doesn't get sorted, it's going to eat me alive. I must get it sorted sooner rather than later."
De Minaur and Fritz are 5-5 in past meetings, though the sixth-ranked American won their meeting in this showpiece event last year.
The Australian's chances remain flickering after Fritz experienced a 6-7 (2-7) 7-5 6-3 defeat to Carlos Alcaraz that guaranteed the Spaniard would progress to the semi-finals as the winner of the Jimmy Connors group.
The second-ranked player's victory, having already defeated de Minaur, put Alcaraz a single victory away of securing the year-end top ranking from Jannik Sinner.
Regardless if he is defeated by Musetti in his last round-robin contest, Alcaraz will reclaim the world No 1 ranking unless Sinner, who beat Auger-Aliassime in his opener on Monday, goes undefeated to defend his ATP Finals title.
"I will try not to think about it," said Alcaraz. "This will represent a extremely important match for me. I will try not to let the anxiety play a bad time in the match. I will think about my objectives, about feeling much better than today."