Sebastian Korda breaks through on Parma clay
The fans allowed into the first-time event supported for the local boy.
"Today I played a really tough opponent and the crowd wasn't easy," Korda said. "They kept cheering him on, but I'm really proud of myself and how I handled it."
Saturday's victory made him the first American player to win a clay court tournament since Sam Querrey in Belgrade 11 years ago.
"This is something that I've dreamed of," Korda said, adding that he had expected to win a title sooner, naming an event in Florida in January.
"I really thought I was going to get it done in Delray Beach, and I was a little heartbroken.".
"But I stayed positive, even with such a bad first part of the clay-court season," he said. "I took a couple of days off, recharged my batteries, and had a really good practice week in Prague with my dad and my coach," said Korda.
Korda plays Pedro Martinez in the first round at Roland Garros where his father reached the final in 1992 losing to Jim Courier.