The fiery Australian has been involved in a succession of controversial incidents during his turbulent career, but finally appears to be fulfilling his potential have claimed his first three ATP tour titles last year.
The 21-year-old won in Marseille in February to make his breakthrough and added titles in Atlanta and Tokyo later in the year to underline his undoubted talent as well as a quarter-final and semi-final in the Masters 1000 events.
He was even in with a chance of reaching the World Tour Finals until a characteristic meltdown over the closing tournaments of the season culminated in a display in Shanghai that appeared to hand victory to his opponent.
It also landed him a suspension and a series of sessions with a sports psychologist and everyone now waits to see if he can fulfil the vast potential and give Australia it's first home men's champion since Matt Edmondson in 1976.
He never went beyond round four at the Grand Slams in 2016 but does have two career quarter-finals in the majors on his CV, including Wimbledon in 2014 and Melbourne in 2015 but was beaten at the Aussie Open last year in the third round by Tomas Berdych.