Ok this actually happens to my friend not so long ago, he is going on a boxing match and he will bet for the heavy favorite, then suddenly an unknown guy whisper to him, that the fight is going to be fixed and he supposedly heard it from the favorite to win, locker room, are you going to listen to that and bet for the underdog.
What's your take?
Although there could be a chance that the unknown guy which informed your friend about the boxing fight to be fixed may be lying but a situation like this happened sometime in the sports game and if I am your friend I will follow my heart while I place big bet on my previous decision and place a small amount bet on the underdog which the unknown guy said he's going to win.