British wildcard Ryan Peniston produced a stirring comeback to beat Francisco Cerundolo and reach the Queen's quarter-finals.
The world number 180, who stunned top seed Casper Ruud on Tuesday, overturned a break deficit in the deciding set to beat the Argentine 6-0 4-6 6-4.
The 26-year-old has reached the last eight in his first appearance at an ATP Tour event.
He will face Serbia's Filip Krajinovic or American Sam Querrey next.
Peniston, the last remaining Briton in the singles draw, looked to be heading for the exit after being broken early in the third.