Wimbledon champion Boris Becker injured a finger today, and he dropped a three-set decision to Tim Mayotte in the quarterfinals of the $237,400 Stella Artois Grass Court Championships at the Queens Club.

Mayotte, who gave Becker his biggest scare at Wimbledon last year, fought off a match point in the second-set tie breaker to overcome the 18-year-old West German, 6-7 (4-7), 7-6 (9-7), 6-2.

Top-seeded Jimmy Connors, yet to lose a set in four matches, defeated No. 7 Paul Annacone, 6-3, 6-4. Also reaching the semifinals were No. 3 Stefan Edberg and unseeded Robert Seguso. Edberg defeated Tim Wilkison, 6-3, 6-3, and Seguso beat Ramesh Krishnan, 6-4, 7-6 (8-6).

In Saturday's semifinals, Connors will play Seguso, of Prairie Oaks, Fla., and Mayotte, of Springfield, Mass., will face Edberg.

With the start of Wimbledon less than two weeks away, the big story could be the middle finger on Becker's right hand. Several times during his match, he shook his arm in obvious pain, although he later said, "It wasn't the reason I lost. I had my chances to win."

Becker said he felt the same pain on at least two previous occasions, but it "was never as bad as it was today. I'm going to see a doctor tomorrow. I think it's a tendon."

Becker said he would withdraw from the doubles.

Becker reached match point at 7-6 in the second-set tie breaker, but Mayotte saved it with a backhand volley, and he won the next two points to even the match.

Becker started having problems with his first serve midway through the second set, and Mayotte finally broke through in the fourth game with a running cross-court forehand.

Connors had a routine afternoon against Annacone, a strong server who has been troubled by a bad back. At 2-2 in the second set, Connors broke at love when Annacone double faulted at break point.