S. Giraldo, retired after completing the first set against Nick Kyrgios.
Ernesto Gulbis retired in his first round match against J. Millman, also after completing the first set.
Be aware of more likely retirements as for many players this is their first match after the U.S. Open. Retirements were as common as a Karlovic Tie-breaker at the last grand slam of the year. Additionally players will have to adept to the circumstances in Asia and today’s morning retirements are likely followed by more.