The Men's International Pro Tennis Council has levied a record $25,000 fine against the organizers of the Stockholm Open because four South Africans were refused visas to enter Sweden, MIPTC Chairman Philippe Chatrier said yesterday.

The new Swedish socialist government denied visas to Kevin Curren, Bernie Mitton, Freddie Sauer and Danie Visser because of South Africa's apartheid policy. The players were told of the decision 10 days before the start of the tournament.

Chatrier said the banned players " . . . are honestly not involved in politics. Our Grand Prix tournaments have nothing to do with politics.

"The recent incident at the Stockholm Open constituted a serious violation of the Grand Prix rules," added Chatrier, who also is president of the International Tennis Federation. "If any qualified player is denied the right to play the Stockholm Open or any other tennis event in Sweden sanctioned by the Grand Prix, all sanctions for all Grand Prix tournaments in Sweden will be withdrawn."

That could mean the end of top-flight tennis tournaments in Sweden, which has one of the world's foremost tennis programs and has produced such stars as Bjorn Borg and Mats Wilander . . .

Tracy Austin beat Sue Barker, 6-3, 6-4, and Pam Shriver defeated Wendy Turnbull, 6-1, 7-6, in Adelaide, Australia, to give the "rest of the world" team a 4-0 lead over a Commonwealth team.

The four-day, $200,000 event is being played along Davis Cup lines, with two teams of three players matched in a series of singles and doubles matches . . .

John McEnroe easily beat Mark Dickson, 6-3, 6-4, to reach the quarterfinals of the $200,00 Grand Prix tournament at Wembley Arena in London. McEnroe will now play Henri Leconte, a 19-year-old Frenchman who may face the U.S. in the Davis Cup final later this month. Leconte advanced when fifth-seeded Brian Teacher was forced to retire with a foot injury with Leconte leading, 6-3, 1-0.