World number three Roger Federer helped Switzerland into the Davis Cup final by beating Italy’s Fabio Fognini in straight sets in Geneva.
Federer and Stan Wawrinka had won their singles matches on Friday, before Italy won Saturday’s doubles encounter.
But Federer’s 6-2 6-3 7-6 (7-4) success over the Italian number one meant the Swiss took an unassailable 3-1 lead.
In the final, they will meet France, who clinched their semi-final against the Czech Republic on Saturday.
Italy’s Andreas Seppi beat Federer’s team-mate Michael Lammer 6-4 1-6 6-4 in the final dead rubber, giving the Swiss a 3-2 victory.
Switzerland have never won the Davis Cup, but were losing finalists in 1992, while France are nine-time winners (most recently in 2001) and seven-time runners-up (most recently in 2010).