Roger Federer says Switzerland will take nothing for granted in this weekend's Davis Cup tie against Great Britain, but expects the hosts to win.
Federer missed Switzerland's defeat by the Netherlands
The winner of the tie will go into the World Group for next year's tournament.
"We'll be the favourites with me as the world number one and us playing at home and on clay," said Federer.
"At the same time Murray is coming along and Greg has had a pretty good summer so they will know they have a chance to pull off an upset."
Switzerland face relegation from the World Group largely because Federer opted out of their last tie against the Netherlands.
At the time Federer wanted to concentrate on his ATP commitments - a decision also taken by Tim Henman, who retired from Davis Cup in January.
"Henman was playing Davis Cup for 10 years, so I think his decision was totally understandable," said Federer.
"At some point it's probably best to decide that you're not going to play, rather than trying to come in and out of the team.
"There will always be people who don't understand, although I think being world number one has helped spare me a lot of criticism.
"Personally I would like to see the Davis Cup being played every two years, which would give everybody a much bigger chance to take part."