Brandon Nakashima defeated reigning champion Alex de Minaur 7-6 (7-4), 6-4 to reach his first Washington ATP 500 semifinal. The American avenged his 2025 final loss to the Australian in the quarterfinal rematch, according to TenisBrasil.

In the other quarterfinal, third seed Taylor Fritz saved a match point to edge fellow American Alex Michelsen 6-1, 3-6, 7-6 (8-6). Fritz reached the Washington semifinals for the second time in his career.

The results set up an all-American semifinal between Nakashima and Fritz.