British number one Cameron Norrie's run at Queen's ended with a disappointing 6-4 7-6 (7-1) quarter-final defeat by American Sebastian Korda.
World number 13 Norrie, the 2021 Queen's finalist, made too many errors in a subdued first-set performance.
Norrie, 27, improved in the second set but played some sloppy shots and served a double fault to lose the tie-break.
World number 32 Korda, 22, will face top seed Carlos Alcaraz or Grigor Dimitrov in the last four on Saturday.