ZAGREB, YUGOSLAVIA, JULY 9 -- A second-string United States swimming team won the women's 400-meter medley relay today for the Americans' first gold medal at the 14th World University Games.

The four Americans -- Jennifer Pokluda, Suzanne Roell, Michelle Branchaud and Ann Drolsom -- won the only gold medal captured by U.S. swimmers on the opening day of the competition. The winning time was 4 minutes 14.38 seconds.

But the star of the day was Noemi Lung of Romania, who won both individual women's races, the 400-meter freestyle and 200-meter medley.

U.S. swimming is being represented here by its second-line team because its top stars are resting for the Pan American Games, scheduled for next month in Indianapolis.

The East Germans, considered among the powers in world swimming, did not enter this competition, apparently giving priority to the European championships scheduled next month for Strasbourg, France.

U.S. swimmers also won two silver and two bronze medals.

David Berkoff of Harvard finished second to Japan's Daichi Suzuki in the men's 100-meter backstroke and Mitzi Kremer of Clemson was second to Lung in the 400-meter freestyle.

Lisa Meyers of California won a bronze in the 400-meter freestyle and David Cademartori of Southern California was third in the men's 200-meter butterfly.

"It's a little disappointing for us to win only one gold on the first day," said Berkoff, who was favored in his event. "I clocked my personal best of 56.89 in the preliminaries, but Suzuki swam perfectly in the finals." Suzuki was timed in 56.57, beating Berkoff by 65 one-hundredths of a second.

Other winners included Andrew Jameson of Great Britain in the 100-meter freestyle (51.42) and Anthony Mosse of New Zealand in the 200-meter butterfly (2:00.20).