ON THE SIDELINES : Becker in Belgian Quarterfinals

BRUSSELS — Top-seeded Boris Becker won a tiebreaker in the deciding set to edge France’s Guy Forget and escape with 3-6, 6-3, 7-6 (7-4) victory today in the Belgian Indoor Championship.

In the tiebreaker, Becker charged the net and overwhelmed Forget with smashes and volleys to win the hard-fought match and advance to the quarterfinals.

Another West German, second-seeded Carl-Uwe Steeb struggled for more than two hours against qualifier Thomas Hogstedt of Sweden before winning 7-6, 4-6, 6-2.

Yugoslav Goran Ivanisevic edged compatriot Goran Prpic 6-3, 6-7, 6-2; Olympic champion Miloslav Mecir of Czechoslovakia beat Aki Rahunen of Finland 7-6, 6-4, and Swede Magnus Gustafsson ousted Amos Mansford of Israel 6-4, 6-4.