Dan Evans moved into the quarter-finals of the Nottingham Open thanks to a 7-5 7-6(2) victory over seventh seed Sergiy Stakhovsky.
Evans, 28, is continuing his comeback after serving a year’s ban for taking cocaine and his latest victory comes after he reached the semi-finals of the Surbiton Trophy last week and the last 16 of the Loughborough Trophy at the end of May.
Unseeded Evans, who is ranked 530th in the world, plays 22-year-old Canadian Brayden Schnur in the last eight.
The Briton, who reached the third round of Wimbledon in 2016, gained a career-high ranking of 41 in March 2017, a month before he tested positive for cocaine at an event in Barcelona.
However his compatriot Alex Ward went out in the second round with a 6-4 6-3 loss to Marcel Granollers of Spain.
Brothers Ken and Neal Skupski moved into the semi-finals of the men’s doubles with a 6-3 6-4 success against the duo of Mats Moraing of Germany and Canada’s Peter Polansky.