Boxer Floyd Mayweather Jr. agreed to pay $5.6 million in back taxes before the Internal Revenue Service was poised to take the money from his purse after his Saturday comeback fight against Juan Manuel Marquez.

The IRS sent the Nevada Athletic Commission a levy notice on Sept. 4 ordering Mayweather's unpaid taxes from 2007 to be deducted from his $10 million fight purse, commission executive director Keith Kizer told The Associated Press.

Kizer said the IRS backed off one week later, after Mayweather agreed to pay the money. Mayweather won the fight in a unanimous decision.