BRIEFLY : MAMIIT BATTLES INTO FINAL.

Cecil Mamiit of USC won his semifinal match Saturday in Athens, Ga., and will try to become the first freshman to win the NCAA men's singles title since John McEnroe did so for Stanford in 1978.

The fourth-seeded Mamiit, who grew up in Eagle Rock, topped Johan Hede of Mississippi 6-4, 6-1 and will face Fresno State's Fredrik Bergh today for the championship. Bergh is from Stockholm, Sweden.

Mamiit, the only seeded player to reach the semifinals, was taken to three sets by Stanford's Paul Goldstein in the second round and lost only 18 total games in his other four matches.

Bergh beat USC's Adam Peterson 6-4, 6-3.

In doubles, Ashley Fisher and Jason Weir-Smith of Texas Christian defeated Chris Mahony and Pablo Montana of Tennessee 6-4, 6-2. Fisher and Smith meet top-seeded Justin Gimelstob and Srdjan Muskatirovic of UCLA following the singles title match.

Gimelstob and Muskatirovic topped TCU's Paul Robinson and David Roditi, in the quarterfinals 6-2, 7-5 before knocking off third-seeded Roger Pettersson and Luke Smith of UNLV 6-3, 6-0 in the semis.

Top-seeded Kylie Hunt of Kansas and Florida's Jill Craybas advanced to the final of the NCAA Division I Women's Tennis Championships in Tallahassee, Fla. Craybas, seeded fourth, beat sixth-seeded Ania Bleszynski of Stanford 6-2, 6-3. Hunt, from Australia, defeated Clemson freshman Sophie Woorons 6-1, 7-5.

Despite a loss by top-ranked Pete Sampras, the United States beat Russia 2-1 at the World Team Cup with victories by Todd Martin and the doubles team in Duesseldorf, Germany.

TRACK AND FIELD Jan Zelezny of the Czech Republic shattered his own world record in the javelin at Jena, Germany, with a throw of 323 feet, one inch. Zelezny set the previous record of 313 feet, 10 inches on Aug. 29, 1993, in Sheffield, England.

American sprinter Kevin Braunskill must serve the four-year suspension imposed after he tested positive for a steroid in 1994, track's world governing body ruled in Monte Carlo, Monaco.

ETC. Mike Aulby made his first championship round appearance of 1996 a successful one with a 248-237 victory over Walter Ray Williams Jr. in the finals of the PBA Greater Baltimore Open at Country Club Lanes. . . .

Germany's Henry Maske had no trouble defending his IBF light heavyweight title for a 10th time with a one-sided decision over John Scully of Connecticut, in Leipzig, Germany.