Mark Johnston's Lady Jane Digby gained a valuable first success at the highest level over in Germany by winning the Grosser Dallmayr-Preis Bayerisches at Munich.
Kirsten Rausing's mare was taking on colts in the Group One event but given a positive ride by Greg Fairley she fairly bounded clear in the straight.
Godolphin's Alexandros gave chase but eventually had to settle for third.
Speaking from Ascot, Johnston said: "It really is wonderful, obviously it was a little bit of a shot in the dark with her in Group One company but she's been running really well and she's a fantastically tough mare.
"It's wonderful for the owner who has been so patient. She broke the point of her hip at the end of last season and I think most people would have retired her but Kirsten said to give her another go.
"The E.P. Taylor in Canada at the end of the year was the big aim but we decided to have a shot at this along the way and it has paid off handsomely.
"I'm so pleased for Kirsten, it's great to have an owner-breeder like that in the yard and I've trained several of the family and it is smashing.
"Most owners would have retired her but I really wanted a place in a Group One before she retired to stud so it has really paid off."