[1] The colt entered the ownership of the Italian entrepreneur Luciano Gaucci's Allevamento White Star and was sent into training with John Dunlop at Arundel, West Sussex.
On his final run of the season Sikeston made his first appearance in Italy when he contested the Group 1 Gran Criterium over 1600 metres on soft ground at San Siro Racecourse in Milan.
[5] On his debut as a three-year-old Sikeston started a 33/1 outsider for the Greenham Stakes at Newbury Racecourse on 15 April and finished tenth of the twelve runners behind Zayyani.
Fifteen days after his poor run at Newbury, the colt was sent to Italy again for the Premio Parioli at Capannelle Racecourse in Rome in which he was again partnered by Dettori.
In September he produced arguably his best performance up to that time when he contested the Phoenix Champion Stakes in Ireland for which he started a 66/1 outsider and finished second, beaten half a length by Elmaamul.
[10] After finishing sixth to Sanglamore in the Prix d'Ispahan at Chantilly Racecourse on 2 June, Sikeston was sent to Royal Ascot sixteen days later for the Queen Anne Stakes (then a Group 2 race open to three-year-olds) over the straight mile course.
[13] Sikeston made no impact on his first two starts as a six-year-old, finishing towards the rear in the Prix d'Harcourt on 5 April and the THF Mile at Sandown Park later that month.
On 17 May in Rome the horse's bid to land back-to-back editions of the Premio Presidente della Repubblica saw him opposed by six rivals including Lara's Idea and the Prix Jean Prat winner Sillery.
In his next two races, Sikeston ran third to Misil in the Premio Emilio Turati in Rome on 7 June and third again in the Queen Anne Stakes at Royal Ascot nine days later.
On 28 June ran in Ireland for the first time in almost two years when he started 3/1 second favourite for the Group 2 Sea World International Stakes over one mile at the Curragh.
[15] In his last two races, Sikeston finished fifth to Marling in the Sussex Stakes and then ran unplaced behind Exit To Nowhere in the Prix Jacques le Marois at Deauville Racecourse on 16 August.