One day after a wet and wild opening day, the Wimbledon tennis championships settled down to more formful activity today as the sun came out and dried off the 15 grass courts of the All England Lawn Tennis and Croquet Club.

Only one seeded man was beaten today - No. 16 Corrado Barazzutti, ousted by Andrew Pattison, 6-3, 6-4, 5-7, 4-6, 6-4 - and that was hardly unexpected.

Barazzutti, 26, had never won a tournament match on grass, usually doesn't play Wimbledon and was seeded only because of the No. 20 world ranking he has achieved with success on clay and hard courts.

Pattison, a 30-year-old Rhodesian who lives in Arizona, is an experienced grass-court player with a solid serve-and-volley game.

He now assumes Barazzutti's favored place in the draw, which could lead to a fourth-round meeting with Victor Pecci, the ascending Paraguayan who was runner-up in the French Open. Pecci beat Sherwood Stewart, 7-5, 6-2, 6-3.

Coupled with the surprising defeats Monday of No. 4 seed Vitas Gerulaitis by fellow American Pat Du Pre, No. 7 Arthur Ashe by Chris Kachel and No. 10 Wojtek Fibak by Bruce Manson, Barazzutti's departure marked the first time since the advent of open competition here in 1968 that four men's seeds had falled in the first round.

The only seed uprooted as play began in the women's singles was No. 12 Sue Barker, a semifinalist in 1977. She fell to 18-year-old Ivanna Madruga, 6-3, 4-6, 8-6, on Court No. 2, where Ashe and Gerulaitis had toppled.

"I have only played a few matches on grass, but I like it. I felt it would be difficult to play her on grass, but she played too nervous," said Madruga, an energetic scrambler who runs down every ball and hits heavy topspin ground strokes from all over the court.

"Sue's got to pull her socks up, or she'll be out of this tournament," BBC Radio commentator Christine Janes noted gravely when Barker trailed by a set and a service break at 3-4 in the second set. Barker fought her way back to win the second set and lead 3-2, 4-15 in the third, but then her socks fell down again.

Defending champion Martina Navratilova and 1974-76 champ Chris Evert, who are seeded to meet in a re-match of last year's final a week from Friday, both played spotty opening matches byt advanced without untoward concern.

Navratilova - watched by her mother, whom she had not seen for almost four years until Monday - got grooved after a hesitant first set and beat Tanya Harford, 4-6, 6-2, 6-1.

Evert eliminated Marita Redondo, 6-4, 6-2, in a Court No. 1 match that had 10 service breaks in the first 14 games.

No. 4 seed Tracy Austin had a first round bye, but her doctor asked for an extra day off so she could rest the painful groin muscle she pulled last week in a tournament at Eastbourne, England. She will not play her first match until Thursday.

Pam Shriver of Lutherville, Md., last year's U.S. Open runner-up who is seeded only 16th because she has had little match play since last September, began her second Wimbeldon with a 6-4, 6-3 victory over Pat Medrado.