Andy Murray was on the brink of a first-round defeat by Yannick Hanfmann at the Geneva Open before play was suspended because of bizarre weather conditions.
The former world number one was trailing 7-5 4-1 in Switzerland when rain started to fall and gusts of wind blew white pollen on to the court.
"It's like it's snowing out here and you still want us to keep playing," Murray argued with umpire Greg Allensworth before it was decided the players should return to the locker room.
Play was cancelled for the day shortly after, and Murray's match was rescheduled for Tuesday - not before 12:00 BST.