SARANGANI, Philippines — Manny Pacquiao says he is planning to file a defamation lawsuit against Floyd Mayweather Jr., the fighter's father, and Golden Boy Promotions

In a statement posted today on his Web site, Pacquiao claims his character has been damaged and tarnished by accusations he says are untrue.

The proposed megafight between Pacquiao and Mayweather 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.

Arum set a Thursday deadline for an agreement on testing, the only issue not resolved for the planned March 13 fight. But 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.