Melbourne (AFP) - Reigning champion Jannik Sinner will face 24-time Grand Slam winner Novak Djokovic in a blockbuster Australian Open semi-final after taming Ben Shelton on Wednesday in straight sets.

The Italian second seed swatted aside the American eighth seed 6-3, 6-4, 6-4 and has dropped only one set in moving ominously into the last four.