Seeded No. 5, Rublev easily eliminated 6-3, 6-2, 6-2 the Italian Gianluca Mager (63rd in the world).
Quarter-finalist in Melbourne last year, the Russian (21), winner of the Davis Cup in December, was impressive (13 aces and 31 winning shots).
After being broken from the start, Daniil Medvedev who then had no break point to erase dominated 6-1, 6-4, 7-6 (3) the Swiss Henri Laaksonen (92nd in the world).