Great Britain's Jack Pinnington Jones is through to his first ATP Tour quarter-final as he continued his superb run at the Dallas Open.
The 22-year-old, who had to come through two rounds of qualifying to make the tournament's main draw, followed up his stunning victory over Italy's world number 20 Flavio Cobolli by beating American Eliot Spizzirri to reach the last eight.
Pinnington Jones, ranked 181st in the world, overcame world number 68 Spizzirri in three sets, prevailing 7-6 (7-5) 4-6 7-6 (7-4).
He will face former US Open champion Marin Cilic for a place in the semi-finals on Friday.