Boris Becker, 17, of West Germany advanced to the final of the $200,000 Belgian American Young Masters tennis tournament Saturday at Birmingham, England by beating Sammy Giammalva, the second-round conqueror of top-seeded Mats Wilander.
Becker defeated Giammalva, 7-6, 6-3, 6-3, and will play Stefan Edberg of Sweden in today's final. Edberg upset countryman Henryk Sundstrom, 6-2, 6-3, 6-3.
Giammalva, from Houston, was the third American to be beaten by Becker, who also ousted No. 5-seeded Aaron Krickstein and Ricky Brown on the way to the semifinal.
Americans Ken Flach and Robert Seguso, both 21, defeated Sandy Mayer of the United States and Wojtek Fibak of Poland, 4-6, 7-6, 6-4, 6-4, to reach the final of the $200,000 World Doubles tournament at London.
In today's final, they will meet the 1982 and 1983 champions, Heinz Gunthardt of Switzerland and Balazs Taroczy of Hungary for the first prize of $72,000.
Gunthardt and Taroczy outclassed Kevin Curren of South Africa and Steve Denton of the United States, 6-4, 3-6, 6-3, 6-2, in the other semifinal.
In the only previous meeting of the finalists, Flach and Seguso defeated Gunthardt and Taroczy, 7-5, 7-6, in the final of last year's U.S. Clay Court Championship in Indianapolis.