On Tuesday morning, the 29-year-old Queenslander and world No 55 defeated the world No 2 Federer at the US Open, bringing ‘The Mailman’ unprecedented overnight success.
Tennis great John McEnroe even labelled the defeat as “one of the greatest upsets in tennis history”.
But it has not been an easy feat for Millman.
Millman, who began playing tennis at age four, began playing as his four sisters all played the game.
Beginning his professional tennis career in 2008, Millman began his career competing in entry-level tournaments.
According to the Daily Telegraph, between 2007 and 2010, Millman’s world ranking quickly rose from 1461 to 204.