John McEnroe, the No. 2 seed for the Wimbledon tennis championships that will begin Monday, is bothered by a shoulder injury, but today insisted he will play in the tournament.

"The shoulder is very sore and I don't know exactly what's wrong with it," McEnroe said. "I'd like to give it a complete rest, but I would not default at Wimbledon, whatever happened. Wimbledon is so important that even if I lost in the first round and didn't win a point, I would prefer to turn up and take my chance."

McEnroe played in the French Open three weeks ago against the advice of a doctor. He aggravated the injury in a fall during the final of the Stella Artois tournament last week, when Jimmy Connors beat him in straight sets.

In the final women's tuneup for Wimbledon, at Eastbourne, Martina Navratilova beat Jo Durie, 6-2, 6-1, and moved into Friday's semifinals of the grass-court tournament along with Tracy Austin, Zina Garrison and Wendy Turnbull. Turnbull advanced by upsetting second-seeded Andrea Jaeger, 6-3, 6-2; Austin stopped Beth Herr, 7-5, 6-1, and Garrison beat Bettina Bunge, 6-3, 6-2.

In the final men's tuneup, at Briston, Tom Gullikson came from behind in the final set to upset second-seeded Hank Pfister, 3-6, 6-2, 10-8, and move into the quarterfinals of the grass-court event.