Shocking's win in the Melbourne Cup was statistically significant as he broke an 86-year drought for saddlecloth 21.
Bitalli, who won the Cup in 1923, is the only other horse to carry number 21 to victory since saddlecloth numbers were first recorded in 1877.
Shocking, who also started from barrier 21 after the scratching of Changingoftheguard, is only the fourth Cup winner to have a matching saddlecloth and barrier.
The most recent was in 1952 when Dalray started from the inside barrier with saddlecloth one.
Russia also had a pair of ones when he won in 1946 while Sirius started from barrier four and carried number four in 1944.