Sporting Digest: Tennis

THE Association of Tennis Professionals is to ask Boris Becker to substantiate allegations of widespread drug use in the sport or face a heavy fine and suspension. Becker is to be questioned in the next two weeks about his reported comments.

THE ATP World Championship, staged indoors in Frankfurt in November, could be held outdoors in the Gulf state of Qatar in 1996 when the contract between the ATP and Frankfurt expires next year.

AUSTRALIAN MEN'S HARDCOURT CHAMPIONSHIP (Adelaide) Singles, quarter-finals: N Kulti (Swe) bt G Raoux (Fr) 7-6 6-3; A Volkov (Rus) bt K Carlsen (Den) 7-5 6-0. Semi-finals: Y Kafelnikov (Rus) bt P Rafter (Aus) 6-1 7-5; Volkov bt Kulti 4-6 6-3 6-3. Final: Kafelnikov bt Volkov 6-4 6-3.

HAWAII OPEN (Honolulu) Singles, quarter- finals: W Ferreira (SA) bt P McEnroe (US) 6-4 6- 4; J Stark (US) bt B Gilbert (US) 7-6 7-6; R Reneberg (US) bt R Furlan (It) 6-4 6-2; R Weiss (US) bt J Arias (US) 6-0 2-6 6-3. Semi-finals: Ferreira bt Stark 4-6 6-4 6-4; Reneberg bt Weiss 6-3 6-2.

QATAR OPEN (Doha) Semi-finals: S Edberg (Swe) bt G Schaller (Aut) 6-4 6-7 6-4; P Haarhuis (Neth) bt G Ivanisevic (Croat) 6-2 6-4. Final: Edberg bt Haarhuis 6-3 6-2.

BP CHALLENGER MEN'S TOURNAMENT (Wellington, NZ) Singles, final: T Woodbridge (Aus) bt H Dreekman (Ger) 6-3 6-3.

AUSTRALIAN WOMEN'S HARDCOURT CHAMPIONSHIPS (Brisbane) Singles, semi- finals: F Labat (Arg) bt M Maleeva (Bul) w/o; L Davenport (US) bt Wang Shi-ting (Tai) 6-2 6-4. Final: Davenport bt Labat 6-1 2-6 6-3.