Godolphin mastered the Group 1, $830,000 St. Leger Stakes at Doncaster on Saturday as the 14-1 Mastery outdueled his favored 9-4 stablemate Kite Wood in the 1 3/4-mile, 132-yard classic.

Yeats was a grave disappointment Saturday at the Curragh as Alandi came late to win the Group 1, $399,000 Irish St. Leger, defeating longshot Clowance by a half-length with longtime leader Schiaparelli third.

Running for the first time since June 18 when he won his fourth consecutive Ascot Gold Cup, the 4-1 Yeats tracked Schiaparelli's pace but gave up the ghost a half-mile from home. The shorter distance of the Irish St. Leger at 1 3/4 miles and the soft ground were to his disadvantage as he weakened to finish last of eight, beaten an astonishing 60 lengths by the winner.

Sand Vixen dented Misheer's Breeders' Cup Juvenile Fillies Turf chances with a victory in the Group 2, $133,000 Flying Childers Stakes at Doncaster on Friday. A Dubawi filly sent off at 9-2, Sand Vixen provided the white-hot Godolphin outfit with yet another stakes victory as she set a course record for 2-year-olds, speeding the straight five furlongs in 58.10 seconds on good to firm ground, breaking Sing Sing's 50-year-old mark by .30 of a second and beating Bould Mover by a length.

Stacelita is the headline attraction Sunday when Longchamp conducts three course and distance preps for the 1 1/2-mile Prix de l'Arc de Triomphe. The undefeated filly will be a deserved short-price favorite in the Group 1, $437,000 Prix Vermeille, the big race trial for fillies and mares that was taken last year by subsequent Arc winner Zarkava.

All the signs point toward Godolphin winning its first British classic since 2004 as Kite Wood carries the favorite's mantle into the 234th running of the $826,000 St. Leger Stakes at Doncaster on Saturday.

Yeats will make his first start since winning his fourth Ascot Gold Cup when he faces seven rivals in the Group 1, $399,000 Irish St. Leger at the Curragh on Saturday. While the distance of 1 3/4 miles is six furlongs shorter than that of the Gold Cup, Yeats - an 8-year-old son of Sadler's Wells trained by Aidan O'Brien - won this race two years ago and has run well fresh in the past. Johnny Murtagh will be aboard.

The world's best stayer, he will be severely challenged by three dangerous foes, though.

Jockey Christophe Soumillon fractured an elbow in a spill at Nancy Racecourse, 175 miles east of Paris, on Wednesday and could miss the remainder of the French racing season as a result.

The 28-year-old Belgian, three times the champion rider in France, was aboard the front-running Burlada in a claiming race when the filly veered into the hedge. Soumillon was thrown onto the track and stepped on by a passing horse.

Misheer, mentioned by trainer Clive Brittain as a possible for the Breeders' Cup Juvenile Turf, will go off as the solid favorite in the Group 2, $132,000, Group 2 Flying Childers Stakes at Doncaster on Friday. Scratched from the Moyglare Stud Stakes at the Curragh on Aug. 30 because of heavy ground, Misheer, winner of the six-furlong Group 2 Cherry Hinton Stakes will face nine rivals in the five-furlong Flying Childers, most notably listed five-furlong Roses Stakes winner Star Rover.

The Group 2, $164,000 Park Hill Stakes at 1 3/4 miles, 132 yards is widely regarded as the filly and mare equivalent of the classic St. Leger Stakes. Thursday's renewal at Doncaster is a wide-open affair in which at least half of the 11 runners have a reasonable chance of victory.

Gitano Hernando, his trip to the Belmont Stakes canceled because of injury after his unlucky second-place finish in the Group 3 Dee Stakes at Chester on May 8, returns to action at Doncaster on Wednesday in a 1 1/4-mile, 60-yard conditions race as a prequel to a possible tilt at the Breeders' Cup Marathon.

"He wrenched an ankle after the Dee Stakes, and it took a long time for the swelling to go down," said Barry Irwin of Team Valor, which owns Gitano Hernando. "He's fine now, but the race couldn't have come up tougher."