[2] The colt was sent to England and entered training Henry Seymour "Atty" Persse at Chattis Hill near Stockbridge in Hampshire.
His dam Ravello was bred in England before being exported to the United States (where she was sold for 120 guineas) and producing Frank Gill, whose wins included the Travers and Withers Stakes.
[8] In the following month the colt contested the Richmond Stakes at Goodwood Racecourse in which he was ridden by the French jockey Georges Stern and won at odds of 11/10.
[13][14] Sweeper started favourite for the Derby over 1+1⁄2 miles at Epsom on 5 June, but never looked likely to win and finished seventh as the filly Tagalie won from Jaeger and Tracery.
[15] At Royal Ascot late in June Sweeper was dopped back in distance and started odds-on favourite for the St James's Palace Stakes over one mile but was beaten into second place by Tracery.
On 11 September Sweeper contested the St Leger Stakes over 14+1⁄2 furlongs at Doncaster Racecourse and rated at odds of 12.5/1 in a fourteen-runner field.