The large-serving Russian had 5 aces and didn’t face a single break level.
Kokkinakis not too long ago beat 20-time Grand Slam champion Roger Federer within the second spherical of the Miami Open — turning into the lowest-ranked man to beat a No. 1 in 15 years — however the highly effective Australian couldn’t produce something like that kind this time.
Khachanov always pressured his opponent’s serve, but may convert solely two of his 13 break factors.
If he beats the winner of that all-French match, Khachanov may face defending champion Rafael Nadal within the third spherical.
Zverev labored to a 6-2, 6-7 (Four), 6-1 win in opposition to 17-year-old Canadian Felix Auger-Aliassime and subsequent faces seventh-seeded Frenchman Lucas Pouille.
Medvedev rallied to beat Marton Fucsovics of Hungary 6-7 (Four), 6-2, 7-5, saving seven of eight break factors. He meets both Kei Nishikori of Japan or 12th-seeded Czech Tomas Berdych, the 2015 runner-up, on Monday.
Two-time champion Novak Djokovic, nonetheless combating a persistent proper elbow harm, can also be in first-round motion Monday.
The ninth-seeded Serb, who not too long ago cut up with coach Andre Agassi, takes on countryman Dusan Lajovic. He beat Lajovic of their solely earlier assembly three years in the past.