Gstaad - German qualifier Yannick Hanfmann reached his maiden career final in Gstaad on Saturday with a tight 3-6, 7-6 (8/6), 7-6 (7/4) win over sixth seed Robin Haase, saving four match points in the process.
The 170th-ranked Hanfmann, who has suffered from a hearing impairment since birth, will face Italy's Fabio Fognini in Sunday's final.
"This means a lot to me," Hanfmann told atpworldtour.com. "Reaching my first final after saving four match points today is amazing. I really like the conditions here and the altitude suits my game.
"The ball bounces higher here. Tomorrow I will be the outsider again and I will give everything. I never expected to reach the final at the beginning of the week."
Fourth seed Fognini defeated Spanish second Roberto Bautista Agut 5-7, 6-2, 6-3 in his semi-final.
"Tomorrow is going to be a tough match because he's beaten a lot of good players," said Fognini.
"I saw him play this whole week and told my team that he's going to be dangerous. But I'm going to go for it and try to win the title."