British number one Dan Evans is out of the Dubai Tennis Championships after a 6-4 4-6 6-4 second-round defeat by Russia's Aslan Karatsev.
After losing the first set to the Australian Open semi-finalist, Evans fought back from 4-3 40-0 down to take the second.
Karatsev got what proved to be the decisive break in the first game of the final set before serving out the win.
He will play Italy's Lorenzo Sonego in the last 16.
Evans, who was beaten in three sets by Roger Federer in Qatar last week, struggled early on in response to some booming returns of serve by Karatsev.