Joe Sacco scored two goals as a Massachusetts wrecking crew led the United States to a 7-1 victory over Switzerland in the first round of hockey at the Goodwill Games before just 2,491 in the 5,800-seat Tri-City Coliseum yesterday in Kennewick, Wash.

It was an easy debut for a U.S. team that already gained attention by defeating the Soviet Union in an exhibition last weekend.

Players with Massachusetts connections scored four goals and added six assists.

The game was scoreless for nearly 10 minutes before Raymond Walder drove the puck past goalie Guy Hebert, a St. Louis Blues draft choice. He had stopped two shots in front before Walder netted a deflection.

Jim Johannson, a 1988 U.S. Olympian, scored at 15:37 with a deflection past Renato Tosio. On a power play, Shawn McEachern passed to Sacco from behind the net and Sacco fired a wrist shot past Tosio for a 2-1 lead late in the first.

Seconds later, McEachern's point-blank shot was blocked by Tosio, but Sacco put in the rebound for a 3-1 lead. Tony Amonte assisted on both goals.

Sacco, McEachern and Amonte are teammates at Boston University. David Emma (Boston College) and Tim Sweeney (formerly BC) also scored.

The United States plays the U.S.S.R. on Monday. Nadia Speaks Out

Former Romanian gymnastics star Nadia Comaneci said she was held captive for three months by the man who helped her defect to the United States last December and later was portrayed as her lover.

In her first extensive interview concerning her relationship with Constantin Panait, Comaneci, in Seattle for the Games, also said the Romanian carpenter had stolen from her $150,000 she earned in appearances throughout the United States following her defection.

Comaneci, who won eight medals in Montreal in 1976 and became the first gymnast to earn a perfect score in the Olympics, drew considerable criticism in the United States while in the company of Panait, married and the father of four. Comaneci, however, denied there was any romantic involvement and that she joined Panait only after he offered to help her escape.

"He didn't let anyone near me," Comaneci said. "He told me all the time what I must say."Clutch Hitting

Kojiro Machida's 14th-inning homer gave Japan a 7-6 win over the United States. The Americans had rallied to tie it with a run in the ninth. Jim Austin and David McCarty homered for the United States, which made six errors.

Roberto Machorro struck out 13 as Mexico beat the Soviet Union, 9-1. The Soviets scored their first run in international competition in the ninth inning as Dmitri Shiyapnikov walked, was singled to third by Alexander Krupenchenkov and scored on Nugzar Popkhadze's groundout. . . .

Of 42 track and field events, only 13 had Goodwill Games record performances. Just three women's events were won in better times than they were at the 1986 Games in Moscow: the 800 meters, 5,000 meters and 10-kilometer walk, the only world record at the meet. Marks were bettered in 10 of 23 men's events. . . .

Terry Schroeder, TBS analyst for water polo who retired from the sport in 1988, said he might come back.

Said Schroeder, 31, coach at Pepperdine: "I know in my mind I can help the team. I know I can play at this level and still be one of the best."

After losing three straight, the United States rallied to a 4-3 win over Italy, with captain Craig Klass scoring the game-winner.Twin Farewells

Twins Jim and Bill Scherr, members of the U.S. wrestling team, celebrated their 29th birthday by advancing to the semifinals, but are competing together for the last time.

Jim Scherr, competing in the 198-pound class, held three opponents scoreless in 7-0, 16-0 and 3-0 victories Friday. Bill Scherr (220 pounds) also advanced to the medal round. He is quitting after these Games to work as a Wall Street investment banker.