Swiss Davis Cup captain Marc Rosset has been sacked ahead of September's World Group play-off against Great Britain.
World number one Roger Federer broke the news to Rosset, citing a breakdown in confidence between captain and team.
"The decision was made unanimously, and I explained it to Marc," said Federer, who will lead the Swiss on home ground from 23-25 September.
"It was justified by reasons within the team. We all have a lot of respect for Marc Rosset as a person and athlete."
Rosset has been involved in 58 Davis Cup ties since being appointed in 2002, and has officiated seven times as a captain.
Federer added: "He is and he will remain a great personality of Swiss tennis."
A decision on who will replace Rosset will be made at a later date, with coach Ivo Werner and physical trainer Pierre Paganini taking charge for the moment.