Albigna bounced back to winning ways with an ultimately clear-cut success in the Prix Marcel Boussac at ParisLongchamp.
Jessica Harrington's charge had looked every inch a top-class filly in the making after winning a maiden and the Group Two Airlie Stud Stakes at the Curragh earlier the season.
The Niarchos family-owned juvenile disappointed when strongly fancied for the Moyglare Stud Stakes three weeks ago, but was later found to be in season.
This one-mile contest presented the daughter of Zoffany with a second chance to grab Group One glory - and while she was under pressure in the hands of Shane Foley before the home turn, she responded admirably to her rider's urgings.
Marieta looked likely to claim top honours after pulling clear of the field, but she tired late on in the testing conditions and 4-1 shot Albigna eventually reeled her in to win with something to spare.
Andre Fabre's previously unbeaten favourite Savarin was well-beaten.
A first success at the top level for Albigna (Zoffany) as she wins the Gr.1 Prix Marcel Boussac @paris_longchamp for @Jessica_Racing & owner/breeders the Niarchos Family #CoolmoreSires #HomeOfChampions https://t.co/BoF2d9dYum— Coolmore (@coolmorestud) October 6, 2019
Harrington said: "I wasn't really confident beforehand as she has only run on good and good to firm ground, so we were going into the unknown. I was really not that confident going into today, but she showed the real Albigna that we see at home.
"I've only seen it the once and I thought she wasn't travelling that great, but Shane said afterwards that she likes to find her feet, which she did in her first two races.
"In the Moyglare she ran a bit free and was found to be in season afterwards."