According to Timeform ratings, which are widely accepted as a definitive measure of the relative merit of racehorses from different generations, Harbinger was on a par with Shergar, Dancing Brave and Sea The Stars, but raced just once at the highest level.
In the King George VI And Queen
Elizabeth Stakes at Ascot in July, 2010, he beat a field that
included Workforce, the Derby winner, Cape Blanco, the Irish Derby
winner, Youmzain, second in the Prix de l’Arc de Triomphe the
previous October, and Daryakana, winner of the Hong Kong Vase the
previous December, by 11 lengths. Sadly, Harbinger suffered a
fractured left foreleg in a routine gallop on the Limekilns in
Newmarket shortly afterwards and, although the injury wasn’t
life-threatening, he never raced again.
Owned by Highclere Thoroughbred Racing
and trained by Sir Michael Stoute, Harbinger was a slow maturing
type, who didn’t race as a two-year-old and, frankly, didn’t
appear to have any aspirations of becoming a bona fide Group 1
contender until he turned four. His three-year-old campaign started
promisingly enough, with an impressive win in a maiden, over 1 mile 2
furlongs, at Chester in May on his second start, followed by another
convincing victory in the Group 3 Gordon Stakes at Goodwood, on his
first attempt at 1 mile furlongs, when next seen in July.
However, despite starting 13/8
favourite for the Group 2 Great Voltigeur Stakes at York the
following month, he trailed in last of the seven runners, beaten 27¼
lengths, behind Monitor Closely. Given another short break, he was
dropped back into Group 3 company for the St. Simon Stakes at Newbury
in October, but could still only finish third of 11, beaten 6¼
lengths.
Harbinger blossomed as a four-year-old,
though, striding clear for an impressive 3-length win over subsequent
Yorkshire Cup winner Manifest in the John Porter Stakes at Newbury on
his reappearance in April, followed by further convincing victories
in the Group 3 Ordmonde Stakes at Chester and the Group 2 Hardwicke
Stakes at Royal Ascot. Before his injury, he was already hot
favourite for the Juddmonte International Stakes at York and the Prix
de l’Arc de Triomphe but was, tragically, the highest rated horse
in the world for just two weeks.