Sebastian Korda said it was "probably the most special moment" of his career as he emulated his father by winning the Washington Open.
The 24-year-old beat Flavio Cobolli 4-6 6-2 6-0 on Sunday to win the second title of his career.
Sebastian's father, Petr, won the competition in 1992, making them the first father and son to win the same title in ATP Tour history.
"We [the Korda family] have a lot of history with this tournament. One of my biggest goals was one day coming here and hopefully winning the tournament and putting my name up there on the stadium," said Korda.