Taylor Fritz is engaged to girlfriend Raquel Pedraza, Fritz announced on social media.
"She said yes," he wrote alongside a photo of the proposal in front of the Eiffel Tower, adding "sometimes when you know, you just know."
Fritz and Pedraza, a junior tennis player, are both 18 years old.
Fellow players, including teenage American Reilly Opelka, sent congratulations to the pair.
Fritz is No. 67 in the rankings.