Scratch won the Solario Stakes in England as a two-year-old and emerged as one of the best of a very strong generation of French-trained colts in the following year.
In the autumn of 1950 he won the St Leger by defeating Vieux Manoir, who had beaten him in the Grand Prix de Paris.
He won the Prix Jean Prat as a four-year-old before being retired to stud where he had an unremarkable record as a sire of winners in Europe and South America.
Scratch's dam Orlamonde was an unsuccessful racehorse but produced several other winners including Damno, who won the Prix d'Arenberg.
[4] On 9 September, Scratch was sent to England to contest the St Leger over 14 furlongs at Doncaster Racecourse in which he was again opposed by Vieux Manoir.
[7] Scratch's win gave Semblat his third British classic of the 1950 after winning The Derby with Galcador and the Oaks with Asmena and helped to make him British Champion trainer despite the fact that he had never set foot in the country during the season,[8] On his return from England, Scratch ran in France's most prestigious race, the Prix de l'Arc de Triomphe over 2400m at Longchamp.
[4] In 1950, the independent Timeform organisation gave Scratch a rating of 134, placing him two pounds below the top-rated three-year-old Tantieme.