Korda has picked up some momentum here in Florida after a slow start to the season. He tested positive for COVID-19 last month and has been limited in winter action.
Other winners in round of 32 matches Tuesday included Marcus Giron, a 7-5, 6-3 victor over Tennys Sandgren; Denis Istomin, who ousted U.S. veteran Sam Querrey 6-1, 7-6 (5); Stefan Kozlov, who rallied to down Emilio Gomez 4-6, 7-5, 6-3; and Mitchell Krueger, a 6-2, 6-4 winner over Jordan Thompson.
Querrey, the 2016 champion at Delray, has now dropped 10 consecutive tour matches. He won his opening match at Wimbledon last summer, hasn’t won since and has dropped 16 consecutive sets.
The Associated Press contributed to this report.