John McEnroe took out defending champion Mats Wilander, 6-2, 3-6, 6-2, yesterday to win the $315,000 Stockholm Open-Scandinavian indoor championship for the third time. Then the Men's International Professional Tennis Council took McEnroe out for misconduct -- "suspended for 42 days, beginning immediately."

It might be cut to 21 days.

The Wimbledon and U.S. Open champion "elected to waive his right of appeal" and accept the suspension, the MIPTC said in New York.

Its duration will be cut in half, letting McEnroe play the Australian Open (the year's final Grand Slam event) and the United States-Sweden Davis Cup final Dec. 16-18, if he forgoes play the next three weeks. He was scheduled for a tournament in London this week, then exhibitions in Antwerp and Canberra.

McEnroe, fined $2,100 for unsportsmanlike conduct in a turbulent semifinal Sunday against Anders Jarryd to exceed the $7,500 yearly fines limit (by $1,100), behaved better in the title match. Better, but not perfectly: he was warned once by the umpire in the second set for verbal abuse.

The warning came at 30-30 after a service return by Wilander was called in. From there, Wilander took control of the set.

But McEnroe took over in the deciding set to improve his 1984 match record to 75-2 and even his career play against Wilander at 3-3. Wilander beat him last year on clay, hard court and grass.