The Los Angeles Clippers have matched a second, revised offer sheet that free agent guard Norm Nixon signed with the Seattle SuperSonics, after the original one was contested by the Clippers and the NBA.

Terms of the new offer sheet reportedly were similar to those Nixon, 30, and the SuperSonics agreed to originally: $2.7 million over five years. In the second offer sheet, terms and language were changed to satisfy NBA salary cap restrictions.

Nixon averaged 17.2 points and 8.8 assists last season . . .

NBA Commissioner David Stern denied the Clippers' request that he set aside the trade that gave them Marques Johnson.

The Clippers sought to have the Sept. 29, 1984, trade, in which Terry Cummings went to Milwaukee, nullified because they were not told Johnson had been treated in a drug rehabilitation center in 1982. Stern said he found no proof of misrepresentation and there was no claim of drug use by Johnson since 1982 . . .

A sprained left ankle kept Knicks rookie center Patrick Ewing in New York while his team was in Detroit to play the Pistons.

According to a team spokesman, the swelling is "minimal and soreness is moderate" and Ewing's status for Friday's game, when the Knicks will play the Washington Bullets at Capital Centre, will be determined today.

The 7-foot center was injured 2 1/2 minutes into Tuesday night's 98-94 victory over the Bullets at Madison Square Garden when he tripped over Bullets center Charles Jones . . .

Knicks forward Bernard King has been working out at a college gym since late summer. King, who led the NBA in scoring last season with a 32.9-point average before incurring severe ligament and cartilage damage in a March 23 game, is able to run, jump and shoot, although not at full strength. He drills behind locked doors at Ramapo College in Mahwah, N.J., three times a week for two hours while the women's basketball team practices.

"Some days it looks like he can go full speed," said Mike Ricciardi, coach of the women's team, who has observed King's struggle. "Some days it's obvious there's tenderness . . . It seems like he's trying to gauge how long it will take until he can do everything automatically without worrying about the injury recurring." . . .

New Jersey Nets center Darryl Dawkins was fined $750 and Dallas Mavericks center Wallace Bryant $500 for fighting. The NBA said the fines include an automatic $250 for being ejected from Friday's game at Dallas.

Scotty Stirling, the NBA's director of operations, said Dawkins precipitated the fight by pushing Bryant in the back while they were jockeying for position. Bryant pushed back, then Dawkins charged at Bryant before officials separated them.