The tournament is chronologically the first of the four Grand Slam tennis events of the year - the other three being the French Open, Wimbledon and the US Open.
Khachanov will compete alongside the Big Four, whichcomprises Roger Federer, Rafael Nadal, Novak Djokovic, and Andy Murray.
Khachanov reached the second round of the 2017 Australian Open, his best AO result to date. In the 2017 Wimbledon Championships he was the 30th seed and he reached the 3rd round before losing to 10 times French Open champion Nadal in straight sets.
The Australian Open will be held on January 15-28, 2018