British number two Cameron Norris beat American Tommy Paul in three sets to reach the quarter-finals of the Indian Wells Masters.
World number 26 Norris won 6-4 4-6 6-2 to claim his 44th win on the ATP Tour this year.
The 26-year-old left-harden has never previously reached this stage of a Masters 1000 tournament.
Norris will face Diego Schwartz man in the last eight after the Argentine beat Norway’s Caspar Rudy in straight sets.
If Norris were to advance past Schwartz man – who he beat in the first round of the 2020 US Open – it will see him replace Dan Evans as the British number one and may also provide enough ranking points to break into the world’s top 20 for the first time in his career.
It would also take him closer to the coveted half-century mark of wins on the ATP Tour in a single season. Andy Murray and Tim Henan are the only Britons to have achieved that feat on the elite men’s circuit this millennium.
Earlier on Wednesday, Poland’s Hubert Mazurka completed a commanding 6-1 6-3 victory over Russian Alan Karate.