Britain's Andy Murray battled back from a set down as he overcame qualifier Roman Safiullin in an entertaining opening round match at the Swiss Indoors in Basel.
But Murray closed out the match in style, winning five successive games as he overturned a 4-1 deficit to beat Russian Safiullin 6-7 (5-7) 6-3 6-4.
He will play Spaniard Roberto Bautista Agut or Serbia's Laslo Dere next.
Currently ranked 49th in the world, three-time Grand Slam winner Murray was originally drawn against Sebastian Korda, who he lost to in the Gijon quarter-finals earlier this month, but the American withdrew because of injury.