1981: two-year-old season Assert made his racecourse debut in a
maiden race over one mile at
Leopardstown Racecourse in September. He showed his inexperience (ran "very green") but finished second behind the impressive winner
Golden Fleece. Three weeks later he was (theoretically at least) moved up in class for the
Group Three Beresford Stakes over a mile at the
Curragh. Ridden by
Christy Roche, he took the lead early in the straight and won easily by four lengths from the odds-on favourite Longleat. On his final appearance of the year, Assert was sent to England for the Group One
William Hill Futurity at
Doncaster Racecourse. He started third favourite but finished eighth of the thirteen runners behind Count Pahlen. Golden Fleece was Sangster's representative in the Epsom Derby and so Assert was sent to contest the French equivalent, the Prix du Jockey Club over 2400 m at
Chantilly Racecourse four days later. Starting the
2.2/1 favourite he took the lead from Real Shadai in the straight and pulled clear to win by three lengths. He was the first foreign trained-horse to win the race since its inception in 1836. Three weeks later, Assert started 4/7 favourite for the Irish Derby at the Curragh, with the American-bred, British-trained
Silver Hawk appearing to provide his only serious opposition. Assert took the lead and quickly went clear of the field to win very easily from Silver Hawk by a margin officially recorded as eight lengths (Timeform made it ten lengths). Assert was then matched against older horses for the first time in Britain's most prestigious
weight-for-age race, the
King George VI and Queen Elizabeth Stakes over miles at
Ascot Racecourse on 24 July. He started the 10/11 favourite ahead of his half-brother Bikala who had beaten a strong field in the
Prix Ganay on his previous start. The other main contenders were
Kalaglow,
Height of Fashion and
Glint of Gold. Assert went past Bikala on the turn into the straight and held off a strong challenge from Glint of Gold, but was caught inside the final furlong and beaten a neck by Kalaglow. On 17 August Assert was ridden by
Pat Eddery in the eleventh running of the
Benson and Hedges Gold Cup over furlongs at
York Racecourse. Starting the 4/5 favourite against six British-trained opponents, he took the lead from the start and pulled clear in the straight vo win easily by six lengths from Norwick. A month later, Assert started the 1/4 favourite for the Joe McGrath Memorial Stakes over ten furlongs. With Roche back in the saddle, he went eight lengths clear in the straight before being eased down to win by three lengths from Kind of Hush. Timeform described the race as being "little more than an exercise gallop" for the winner. On 3 October, Assert started 5/2 favourite for the
Prix de l'Arc de Triomphe on very soft ground at
Longchamp Racecourse. He was well-positioned turning into the straight but dropped away in the closing stage and finished eleventh of the seventeen runners behind
Akiyda. ==Assessment==