From the DC website, Switzerland DC team members for the tie against Australia will be:
George Bastl, Yves Allegro, Michael Lammer, Stanislas Wawrinka.
Federer will not play it.
I think Stan will play two single matches, and probably play the doubles match with Yves as well, seems they played doubles in quite a few former tourneys already?
SWITZERLAND v AUSTRALIA
Venue: Geneva, Switzerland (clay – indoors)
Captain: Severin Luthi
Captain: John Fitzgerald