DC United midfielder Paul Arriola left Saturday night's preseason exhibition at Orlando during the first half with a right knee injury.
Arriola, a 25-year-old midfielder, will have a scan to determine the extent of the injury, team spokesman Sam Legg said.
Arriola has been a regular starter for the U.S. national team under coach Gregg Berhalter. Arriola has five goals in 33 international appearances.
Costa Rica midfielder Ulises Segura (12) and United States forward Paul Arriola (7) vie for the ball during the first half of an international friendly soccer match in Carson, Calif., Saturday, Feb. 1, 2020. (AP PhotoRingo H.W. Chiu)
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Paul Arriola, center, a forward on the U.S. Men's National Soccer team, kicks the ball during a scrimmage Wednesday, Jan. 8, 2020, in Bradenton, Fla. The team moved its training camp from Qatar to Florida in the wake of Iran's top military commander being killed during a U.S. airstrike in the Middle East. (AP PhotoChris O'Meara)