The United States reached the Davis Cup tennis final tonight when John McEnroe and Peter Fleming scored a doubles victory to give the Americans a 3-0 lead in their best-of-five series.

McEnroe and Gene Mayer won their singles matches Friday night and the 6-2, 6-2, 3-6, 8-6 doubles victory over Peter McNamara and Paul McNamee means Sunday's singles are meaningless.

In the final, the United States will face New Zealand or France. France leads the other semifinal, 2-1.

The Australians began well, with McNamee taking the first game without losing a point. The Australians forced McEnroe twice to deuce and he had to save one game point before the uncharacteristically well-behaved New Yorker held his service.

McNamara then dropped his service and Fleming held his, and from then on nothing went right for the Australians.

They dropped the first two sets and went three games into the third set before McNamara finally won a service game. Fleming dropped his serve after double faulting at 0-40 to put the Australians ahead, 3-1, and they held on to take the set.

The fourth set went with service. The Americans wrapped up the match in the 14th game by breaking McNamara's service.