With odds like these there is high potential of fight being fixed. I am not saying that it is. It is my pure speculation, but we have seen something similar in the past.
I am talking about about Mayweather vs. Pacquiao fight. There are many theories suggesting that fight was fixed.

Reference: http://ftw.usatoday.com/2015/05/conspiracy-theorists-think-they-can-prove-the-mayweather-pacquiao-fight-was-fixed