Brandon Nakashima defeated Daniel Elahi Galan 6–3, 4–6, 6–4 in the quarter-final of the ATP 250 San Diego event on hard court. As the pre-match favourite at odds of 1.32, Nakashima delivered the expected result, though Galan mounted a competitive challenge by claiming the second set. The American controlled the opening set decisively before Galan levelled the match, but Nakashima regained momentum in the decider to secure his place in the semi-finals. The victory maintains Nakashima's upward trajectory at the tournament and keeps him on course for a potential title run.