Santiago Giraldo and Quentin Halys got on the court for all of 20 minutes on Sunday.
Rain delayed the start of their final in the $100,000 Fairfield (Calif.) Challenger for 4 1/2 hours, then suspended it with Hayls leading 3-1, ad-out.
The first meeting between the second-seeded Giraldo, a 28-year-old Colombian, and the unseeded Halys, 19, of France is scheduled to resume today at 10 a.m. at Solano Community College.
After three days of rain, today's forecast is for partly cloudy weather with a 20 percent chance of precipitation and a high of 70 degrees (21.1 Celsius).
Giraldo, who won the $50,000 Sacramento Challenger in 2009, is trying to finish the season in the top 70 for the sixth straight year. Ranked a career-high No. 28 in September 2014, he rose 13 places to No. 111 by reaching the Fairfield final.
Halys, who ousted top-seeded Frances
Tiafoe in the second round, improved 21 spots to No. 149. He advanced to the second round of this year's Australian Open -- losing to eventual champion Novak Djokovic 6-1, 6-2, 7-6 (3) -- and French Open.
Halys is playing in his second Challenger final. He beat Tiafoe in three sets to win the $50,000 tournament in Tallahassee (Fla.) on clay in April.
Wild cards Brian Baker, 31, of Nashville, Tenn., and Mackenzie McDonald, a 21-year-old native of Piedmont in the San Francisco Bay Area, won the doubles title on Saturday.
Here are the Fairfield singles