[8] He made his track debut in April 1930 when he was unplaced behind Christopher Robin in the Greenham Stakes at Newbury Racecourse and then finished well down the field in the 2000 Guineas which was won by Diolite.
He missed the Derby and reappeared in the St James's Palace Stakes at Royal Ascot and came home fourth behind Christopher Robin who won from Rustom Pasha.
[5] A month later he was narrowly beaten in the Gratwicke Produce Stakes at Goodwood Racecourse when attempting to concede ten pounds to the winner Ramesses the Second.
At Doncaster Racecourse on 10 September Singapore, ridden by Gordon Richards, started the 4/1 joint-favourite alongside Parenthesis in a thirteen-runner field for the 155th running of the St Leger.
The other contenders included Diolite, Ut Majeur and Rustom Pasha, who had defeated older horses to win the Eclipse Stakes but the field was considered a substandard one by St Leger standards.
[11] On his final appearance of 1930, the colt was dropped back in distance for the ten furlong Champion Stakes at Newmarket but finished unplaced behind Rustom Pasha.
The 1931 Gold Cup on 18 June proved to be a highly controversial race which saw Singapore (ridden by Richards) beaten a short head by Trimdon[13] after being barged into the rails by the winner inside the final furlong.