A flustered Jelena Ostapenko has become only the sixth female grand slam champion to fall at the first hurdle of her title defence when she lost to Kateryna Kozlova at the French Open.
The world No.5 never looked at ease on the Roland Garros main show court on Sunday, slumping to a 7-5 6-3 defeat to a Ukrainian opponent who had won both the pair's previous meetings.
Not since Anastasia Myskina lost in the opening round of the 2005 tournament has the French Open lost its women's champion so early.
By losing, Ostapenko joins a ignominious group including, as well as Myskina, Steffi Graf, Jennifer Capriati, Svetlana Kuznetsova and Angelique Kerber who all lost as grand slam champions on the first run of their defences.
Kozlova, competing with a large, weeping blister on her heel that caused her to take a medical break at the end of the first set, was well worth the victory, playing with power and composure, in contrast with the flustered champion.
Ostapenko's eyes searched the coach's box at every opportunity but could find no answers as she checked out early.
"It was terrible day," she told reporters afterwards, her pink cap pulled low over her eyes.
"Honestly today began not in a nice way and I knew something like that could happen, so I tried to stay positive. But ...
"I just woke up here and my mood was not amazing. few things go wrong and you are pissed off but you try to stay positive. Then you lose a match and it is no longer possible to be positive."
Ostapenko said she might have had a better chance had she been scheduled on Monday or Tuesday but it simply hadn't been her day.
"When I went on court today, I had this unbelievable pressure and felt I was not myself on court."
"I will just try to forget this as soon as I can."
It might appear lower-ranked players are becoming something of an achilles heel to the Latvian - already this year she had lost to two players outside the world's top 50.
Kozlova, ranked 66, makes it an unhappy hat-trick for the 20-year-old.