Davis Cup organizers unanimously rejected an appeal by Spain on Thursday over the United States' choice of playing surface for the quarterfinal in July.
The Spanish Tennis Federation disputed the use of the surface - better known as Indoor Hard Premiere - saying it is not on the list of 91 manufacturers approved by the International Tennis Federation and "fraudulently infringes" Davis Cup rules.
But the ITF's three-member Davis Cup Committee gave the Americans the go-ahead, saying it complies with regulations and is "of the type Acrylic, which is used in over 30 tour events and two Grand Slam tournaments."
The pace of the court will, as usual, be tested with a match ball once it is laid and available for play.
The July 8-10 quarterfinal will be in Austin, Texas.
Spain has won the Davis Cup four times since 2000, while the Americans have won a record 32 times.