As the Australians and the Americans continued their first-round Davis Cup match on grass at historic Kooyong Stadium in Melbourne, tennis officials confirmed Friday that the matches should have been played on a hardcourt surface.
In a statement, the International Tennis Federation attributed the extraordinary situation to a three-way “oversight” by the I.T.F., the United States Tennis Association and Tennis Australia, “which all acknowledge.”
The I.T.F. said the matter now would be examined by its Davis Cup Committee.
“We recognize that an oversight has taken place regarding the playing surface for the first-round Davis Cup match taking place in Kooyong, Australia,” said Chris Widmaier, a spokesman for the U.S.T.A., in an email Friday. “We look…