German-bred Kazzia beat Quarter Moon by a half-length Friday to win the Vodafone (English) Oaks (Eng-I) at Epsom.Ridden by Frankie Dettori for trainer Saeed bin Suroor, Kazzia led from the start and withstood a challenge from Quarter Moon in the 1 1/2-mile race to become the first filly since Salsabil in 1990 to complete the Sagitta One Thousand Guineas-Oaks double.It was a third victory in the Epsom fillies' Classic for Dettori, who rode an almost flawless race for Sheikh Mohammed's Godolphin team.Dettori, who also won on Balanchine in 1994 and Moon Shell in 1995, praised Kazzia for running a strong race on the rain-softened track."She was very tough. I was going to give anyone a fight today if they wanted to beat me," Dettori said. "We were full of confidence before the race, the rain came and we knew she liked soft ground, we knew she would stay, so we said, 'Come on and make it'." The 10-3 favorite, Kazzia completed the distance of 1 1/2 miles and 10 yards in 2:44.52. Quarter Moon (By Sadler's Wells) was a half-length back in second, 14 lengths in front of Shadow Dancing.A 3-year-old daughter of Zinaad, Kazzia was bred in Germany by Frau R. Grunewald. Trained by Andreas Wohler for owner Rennstall Wohler as a 2-year-old, Kazzia won the Premio Dormello (It-III). In her first start for new owner Godolphin, Kazzia won the One Thousand Guineas (Eng-I) at Newmarket on May 5 of this year.Also on Friday's Epsom card, German-bred Boreal, a 4-year-old son of Java Gold took the Vodafone Coronation Cup (Eng-I) as favored Kutub was eased. Trained by Peter Schiergen for breeder-owner Gestut Ammerland, Boreal completed the distance of 1 1/2 miles and 10 yards in 2:45.01.Boreal won the BMW 132 Deutsches Derby (Ger-I) and placed in three other group I races last year. Previous to his Epsom victory, Boreal was third in the Dubai Sheema Classic (UAE-I) that was part of the Dubai World Cup card on March 23 of this year.