France are also in the last four despite looking dead and buried on Friday when they lost the opening two singles matches against a weakened Germany line-up.
Jo Wilfried-Tsonga earned France a 3-2 victory in Nancy, winning the decisive singles rubber against Tobias Kamke to set up a semi-final against holders Czech Republic who breezed past Japan in Tokyo.
Federer, winner of a record 17 grand slam singles crowns, has never won the Davis Cup but has targeted it this year alongside team mate Stanislas Wawrinka.
Australian Open winner Wawrinka, who struggled badly for most of the tie, finally found some form to beat Mikhail Kukushkin 6-7(4) 6-4 6-4 6-4 to level the tie at 2-2 on Sunday before Federer swept past Andrey Golubev 7-6(0) 6-2 6-3 in front of a partisan crowd in Geneva.
- Sports & Recreation
- Stanislas Wawrinka
- Tobias Kamke