Italy's Jannik Sinner destroyed Daniil Medvedev 6-1, 6-2 in just 69 minutes on Friday to reach the final of the ATP Miami Open.

World number three Sinner will face either Germany's Alexander Zverev or Bulgarian Grigor Dimitrov in Sunday's final and will be a clear favorite after his display of power and skill in the semi-finals.

The Italian had lost to Medvedev in the Miami final last year but beat him in the Australian Open final in January.

The outcome was never in doubt this time as Sinner utterly dominated from the outset.

Sinner broke Medvedev's first service game to go 2-0 up in the opening set, pinning the Russian in the corner at the end of a long rally before blasting a winner past him.

While the 22-year-old looked fresh and fired up, blasting with power from the baseline while inventive when he came to the net, Medvedev was struggling to just hold his serve and the Italian broke again in the fourth game, taking advantage of his fourth break point.

A rattled-looking Medvedev finally held in the sixth game but Sinner served out to love to complete a first-set rout in just 33 minutes. (AFP)