Sinner has won more titles than lost games in a season of remarkable consistency.
He has won eight trophies, including triumphs in Rotterdam, Miami, Halle, Cincinnati, Shanghai and Turin, as well as his Slam double.
His eight titles and 70 wins make it the most successful season on the ATP Tour since Andy Murray in 2016.
He won a further three singles matches at the Davis Cup, meaning he lost just six times this year to just four opponents.
Wimbledon and French Open champion Carlos Alcaraz defeated him three times, while there were also losses to Daniil Medvedev and Andrey Rublev.
The worst-ranked opponent Sinner lost to was Stefanos Tsitsipas – ranked 12th in the world – in Monte Carlo.