Yes, you are right, the Philippine Flag is in Red and it is raised in the grandstands amidst a battalion of English fans with their Union Jacks proudly displayed. You can see this clearly in the fight coverage.
For the information of the whole boxing world, the Philippine Flag has the unique character that the same can be displayed with the Red color side of the flag at the top. This is done when the Philippines is officially at war with any country or entity.
Celebrate and enjoy when you see the blue side is on top when the Philippine Flag is displayed. But run and take cover when you see the Red Side of the Philippine Flag is displayed on top! Because the Philippines is at War! And Manny "Pacman" Paquiao is at war!
Thus, party and enjoy the moment, when Pacman dances to the music of the fight; but, run and take cover when the Red Side of the flag is displayed!
Every Filipino knows this but not other peoples of the world. And just like Ricky Hatton, an Englishman who learned this lesson late, Mayweather Jr., an American, could be in to a big surprise!
He could ask his countrymen about the legendary Filipino soldiers of Bataan and Corrigedor and the infamous Death March of World War II. The Best Soldier in the World? Go ask your legendary Supreme Commander of the United States Allied Forces in Asia and the Pacific in WW II and "The Last Shogin" of Imperial Japan, Gen. Douglas MacArthur.
And without batting an eyelash, he will tell you straight: My son, the best soldier in the world is one who is willing to defend his people, and die for his country and the United States of America without the thought of fame or reward. These are the men of Corrigedor and Bataan and The Philippine Islands. He is the Filipino Soldier.
Manny "Pacman" Paquiao is a Pilipino. And Paquiao is a Pilipino Soldier in real life.
Therefore, all ye Mayweathers, Mosleys and Marqueses, run and take cover when you see the Red Side of the Philippine Flag displayed on top because you could be the next: Timber!