Filipino boxer Manny Pacquiao trains in preparation for his Nov 24 Clash in Cotai against American Brandon Rios at the Venetian Macau on Wednesday.

An ugly scene erupted between the two camps on Wednesday, with racial slurs being exchanged during a physical altercation over a dispute regarding access to a gym.

The 34-year-old Pacquiao has denied speculations that he would consider retirement if he loses to Rios.

As warm-ups for the main event, Chinese boxers Zou Shiming and Yang Lianhui will be in action in undercard fights. [icpress.cn]