Tree trunks were broken and water rushed over the US Open area of Flushing Meadows in New York when Hurricane Ida struck.
The city shut down all public transport and only emergency vehicles were allowed to enter the streets.
Schwartzman knocked out the 2017 US Open finalist, Kevin Anderson, 7-6 (7-4), 6-3.6-4 in the second round.
The match began at 01.30 Swedish time at Louis Armstrong Stadium, an arena with a movable roof, according to Reuters.
Moved path
It did not help, however, because the rain masses with the help of the wind blew in from the side and the match had to be interrupted for 2.5 hours.
People sat under umbrellas even though they were under the roof.
The organizer then waited for the end of Stefanos Tsitsipas and Adrian Mannarino and moved Schwartzman-Anderson to the center court Arthur Ashe Stadium where conditions were better.
- I was ready to play and did not want to wait until tomorrow.
You never know what can happen and thank you to everyone who stayed to watch the match, says Schwartzman after the match ended at 07:00 Swedish time.