Andy Murray has withdrawn from Great Britain's team for the Davis Cup Finals because of a shoulder injury and has been replaced by Liam Broady.
Britain face Serbia - led by 24-time Grand Slam champion Novak Djokovic - in the quarter-finals on 23 November.
"I've picked up a minor shoulder injury which means I won't be able to take part in the Davis Cup," Murray said.
"I'm gutted not to be part of the squad but my focus is now on rehab and getting ready for the new season."
Broady was due to play league tennis for a French club next week before being summoned to replace 36-year-old Murray.
"It's not the way I'd have wanted to be called up, but as always I take great pride in representing Great Britain," Broady, 29, said.
"I can't wait to help the team progress through the tournament in any way I can."
World number 102 Broady has made just one previous appearance in the competition when he played Albert Ramos-Vinolas on clay in Marbella in 2018.
Great Britain captain Leon Smith was already without Dan Evans after he recently withdrew from the team because of a calf injury.
He was replaced by Joe Salisbury, with Cameron Norrie, Jack Draper and Neal Skupski the other members of the squad.
Britain's Davis Cup ties will be shown live on BBC iPlayer and the BBC Sport website and app.
The other quarter-finals will be played between 21 and 26 November.
Russell Fuller, BBC tennis correspondent
Captain Leon Smith has lost his element of surprise and the chance to keep Serbia guessing about the make-up of the British team.
Liam Broady is the obvious addition to the squad given the risk of injury to either Jack Draper or Cameron Norrie.
But they are extremely likely to play singles and the doubles team is now locked in as neither Dan Evans nor Andy Murray are available.
I am told it is possible Murray could still be in Malaga for part of the week. It will depend on his rehab, but his presence as a tactician and motivator would be very valuable.
Murray may not have played anyway, but it will be tough for him to sit on the sidelines as we wonder whether we will ever see him in a GB Davis Cup shirt again.