Kyrgios came close to clinching his first grand slam title when he met Novak Djokovic in the Wimbledon final in July, taking the opener but ultimately succumbing to defeat in four sets on Centre Court, reports DPA.
Chung was coming into this encounter on the back of a five-set hard-fought win against Fernando Verdasco in a match which had lasted over three hours and 20 minutes.
According to tournament organisers, the Australian wildcard entry Kokkinakis pulled out of the Thursday evening tie with a right shoulder problem.
Nadal carried plenty of momentum into the US Open after claiming his 35th ATP Masters 1000 title at the Coupe Rogers in Montreal.
