At the moment there are many rumours about match fixing in tennis. During this week a match between both Bondarenko sisters took place. Here is a screenshot a user from the Betfair forum made:
K. Bondarenko: 2.20
A. Bondarenko: 1.82
I think you do not need to be an expert of trading on tennis. Kateryna was one set in front, but Alona was heavy favourite? Really strange. I did not trade the match. I also do not trade matches, when Serena Williams plays against her sister Venus Williams. It is a lottery. There are other good matches, so no need to waste your time and money on matches like this.
I also do not understand why people complain about match fixing. If there is something wrong or something seems to be too obvious, just stay away.
I want to make clear, that I am not a fan of match fixing, but I think nobody should complain, when putting on trades on matches like this. Even if you entered and you recognize a strange odds movement just make it each way and stay away.