FLIGHTLINE will not race again. It was confirmed on Sunday that the undefeated Breeders' Cup Classic winner has run his last race and will be retired to stand at Lane's End Farm in Kentucky.

His stud fee has yet to be decided.

On Saturday Flightline lived up to his reputation at the world’s best racehorse with a spectacular success in the $6 million Breeders’ Cup Classic at Keeneland.

The 2/5 favourite, now unbeaten in six lifetime starts, tracked the front-running Life Is Good through a strong early pace before effortlessly breezing past and running out an eight-length winner without being fully extended. Olympiad ran on for second and Taiba took third. Second favourite Epicenter was pulled up with an injury.

Trained by John Sadler and ridden by Flavien Prat, Flightline is a four-year-old by Tapit. He was bought for $1 million as a yearling but did not make his racetrack debut until the April of his three-year-old career.

He missed all last year’s Triple Crown races but did win a Grade 1 race last Christmas by over 11 lengths which marked him out as a special talent.

This year Flightline won the Met Mile at Belmont in June by six lengths before he inflicted a near 20-length defeat over Dubai World Cup winner Country Grammer in the Pacific Classic at Del Mar.

Flightline is rated the best horse in the world, with a mark of 139 before his Breeders’ Cup success – with Europe’s top performer Baaeed on 135.