Don Juan (foaled 1869) was an Australian bred thoroughbred racehorse who is most notable for winning the 1873 Melbourne Cup.
[3] On 7 November 1873, Don Juan started the 3/1 favourite in the Melbourne Cup and won by 3.5 lengths in a then record time for the race of 3:36.00.
[5] A day after winning the Melbourne Cup, Don Juan was successful in the Royal Park Stakes at Flemington.
In February 1874, Don Juan was on a training gallop at St Albans Park, Victoria when he suffered soreness and blood was noticed in his nostrils.
An autopsy revealed internal bleeding and the cause of death was due to an inch long rent found in his heart.