The pair have been unable to reach mutually acceptable terms for what could be a box office record-breaking fight for the last three years, but they have been involved in an ongoing verbal spat.
Earlier this week, Mayweather called Pacquiao desperate, and 'Pac-Man' has responded by claiming that the 35-year-old has actively tried to sidestep a fight with him.
"If the fight doesn't happen, it's not my fault," said Pacquiao.
"I'm not going to accuse him of being greedy or judge him, it's hard to judge. It's his title, it's his life, but I believe he is avoiding me."
Pacquiao will square off against Juan Manuel Marquez for a fourth time in Las Vegas, Nevada on December 8.