Germany's Daniel Altmaier rallied for a 1-6, 7-6 (5), 6-4 victory against Denmark's Holger Rune in first-round action Wednesday at the Rolex Shanghai Masters.

Altmaier trailed 4-3 in the deciding set before sweeping the last three games, two on his own serve, to finish in 2 hours and 15 minutes. He converted his only break point of the match in the ninth game to take the lead.

"There were a couple of points where I really had to fight," Altmaier said, pointing out his spectacular backhand pass to set up match point. "I've been working on that the past few days. My confidence hasn't been the highest. It paid off in a really special moment today."

Rune, who returned to competition last month after rupturing his Achilles last October, had more winners (34 to 29) and fewer unforced errors (29 to 31).