There is no such thing as a fixed game. Those who have info about fixed games surely won't give it to others. The more people bet on some event, odds drop. Nobody is that stupid.
It is not the fact that the odds will drop (even so, a 2.00 odd is really good). The fact is that investigations will be on that particular match if bookmakers suspect something dodgy. Hence, more problems will arise on the genuinity of the tournament itself.