Djokovic, playing in his first tournament since being disqualified from this month’s US Open, won 7-5 6-3 in the final to make certain he goes into next week’s French Open.
Watched by a crowd of about 1,000 socially distanced fans, Djokovic got off to a poor start against Argentine eighth seed Schwartzman, finding himself two breaks down at 3-0 as the rain fell in Rome.
“I’m super pleased,” Djokovic said.
“It was a great week, a very challenging week. I don’t think I played my best tennis this week but I think I found my best tennis in the decisive moments.
“I’m proud I managed to needed to find that fifth gear when I needed to.”