Aidan O'Brien was the least surprised man at Epsom when 50-1 shot Qualify gave the Tipperary-based trainer his fifth win in the Classic.
O'Brien, who last won the race in 2012 with Was, said: "We always thought she was a very good filly.
"She was off for the winter and the plan was to run in her in the two Guineas (English and Irish) and then come here.
"The run at Newmarket went a bit wrong and she then went to the Curragh. Seamus (Heffernan) rode her stone cold that day and she ran a really good race.
"No one really noticed her, but she finished off really well," he added.
"Colm (O'Donoghue) gave her a peach of a ride to produce her on the line. It was class."
O'Donoghue said: "I'm not surprised, she's always shown a lot of pace and is a well-balanced filly."