FUJISAWA, Japan (AP) _ Top-seeded Nicklas Kulti trounced Swedish compatriot Douglas Geiwald 6-4, 6-1 in the semifinals to earn a berth against American Tommy Ho in the finals of the JAL Super Junior Tennis Championship.

Ho, the No. 2 seed, downed third-seeded Martin Damm of Czechoslovakia 7-5, 6-2 in Saturday's other semifinal match in the Shonan Sports Center.

Top-seeded Petra Ritter of Austria will play Japan's Rika Hiraki, the second seed, in the girl's final match. Both won their semifinals Saturday.

Hiraki struggled the second set tie-break before beating third-seeded Andrea Strnadova of Czechoslovakia 6-3, 6-7 (5-7), 6-2, while Ritter posted a 7-5, 3-6, 6-3 triumph over Elena Makarova of the Soviet Union.

The two final matches will be held on Sunday.

A field of 128 players, 18 years old or younger, from Austria, Brazil, Czechoslovakia, India, Indonesia, Japan, New Zealand, Norway, the Philippines, South Korea, the Soviet Union, Sweden, Taiwan, Thailand and the United States competed in the six-day tournament.

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EAST RUTHERFORD, N.J. (AP) - The New Jersey Nets have announced that forward Roy Hinson, who missed the last five games because of tendonitis in his right knee, will undergo progressive physical therapy during the next week.

Aftter the therapy is completed, Hinson's knee will be re-examined by team doctors, who will decide whether Hinson can rejoin the team, officials said Friday.

Nets officials said Hinson may not be available to play the team's season opener against Miami on Nov. 3.

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KENORA, Ontario (AP) - Steve Graves scored on a power play midway in the third period to give the Canadian national team a 4-3 victory over the Czechoslovakian Olympic team in an exhibition hockey game.

Graves took a pass from Lane Lambert and slipped a backhander past goalie Ladislav Blazek at 9:10 to break a 3-3 deadlock Friday night.

Also scoring for Canada were Danny Gratton, Steve Nemeth and Brad Schlegal. Replying for Czechoslovakia were Radek Toupal, Radim Radevic and Radek Kamps.

The win gave Canada a 2-1 lead in the best-of-five exhibition series against the Czechoslovaks. Ed Belfour stopped 29 shots for the win as the Canadians were outshot 32-26.

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POUND RIDGE, N.Y. (AP) - After dropping 49 straight games, Ulster County Community College's basketball team is looking for a new coach, and school officials say they hope to snap the losing streak this season.

Coach Tom Hart said this week he was stepping down because he could not devote enough time to the $2,500-a-year part-time job. Hart was 0-49 in his two seasons as coach.

Hart, who previously coached at Columbia-Greene Community College, called Ulster a ''tough place to win.''

''If they had dorms or some sort of living arrangement for the players, it would be different,'' he said. ''The schools we go up against - Sullivan, Orange and Westchester (community colleges) - all have dorms or apartments nearby.''

Despite Ulster's dismal record and long losing streak, college President Robert Brown and Athletic Director Al DiBernardo had supported Hart.

''Tom faced a difficult situation,'' DiBernardo said. ''The kids gave their best, but were overmatched height-wise.''

DiBernardo said there is hope the school's losing streak will end this season. Two promising players from a championship team at Kingston, N.Y., High School are practicing with the team, he said.

''I also think we'll have some pretty good players coming out for the team once our football season is over,'' DiBernardo said.

Ulster's season begins Nov. 13 against Schenectady Community College.