Manny Pacquiao

said he plans to file a defamation lawsuit against

Floyd Mayweather Jr

., the fighter's father, and Golden Boy Promotions.

In a statement posted yesterday on his Web site, Pacquiao claims that his character has been damaged and tarnished by accusations he says are untrue. Floyd Mayweather Sr. repeatedly has accused Pacquiao of taking illegal substances, according to

"Enough is enough," Pacquiao said in the statement. "These people, Mayweather Sr., Jr., and Golden Boy Promotions, think it is a joke and a right to accuse someone wrongly of using steroids or other performance-enhancing drugs. I have tried to just brush it off as a mere pre-fight ploy, but I think they have gone overboard."

A planned March 13 fight in Las Vegas is in danger because the sides have failed to find a compromise to a dispute over blood testing. Promoter Bob Arum declared the bout dead Thursday.

At the core of the dispute is the insistence of the Mayweather camp on using Olympic-style drug testing for the fight, even though both fighters have never been linked to any performance-enhancing substances.

Arum had set a Thursday deadline for an agreement on testing. With the Mayweather camp still insisting on using the U.S. Anti-Doping Agency to conduct the tests, Arum said there wasn't much left to discuss.

WINTER SPORTS: Daisuke Takahashi finished first in the short program in the Japan national figure-skating championships in Osaka, moving a step closer to earning a spot for the Vancouver Olympics.

Takahashi, who is making a comeback from a knee injury, landed all his jumps to record a personal-best score of 92.85 points.

"There were no major mistakes today," Takahashi said. "I still need to work on a few things like the axel and my steps, but overall I was pleased."

Two men will earn berths for Vancouver in the Japan nationals that end tomorrow.

Takahiko Kozuka, the 2006 world junior champion, was second with 80.54 points, while Nobunari Oda, who already secured a place in the Olympics by finishing second in the GP finals, was third with 79.60 points.

The women's short program is today. Miki Ando already has earned a place in Vancouver, leaving Mao Asada, Yukari Nakano and Akiko Suzuki vying for the final two spots.

Japan's Olympic team will be named tomorrow.

AUTO RACING: Emporia, Kansas, the home of Clint Bowyer, added the name Clint Bowyer Boulevard to Graham Street, honoring the NASCAR driver who has donated thousands of dollars to city.

- Staff and wire reports