Just hope they start to give more importance to this issue. Nothing new for those envolved on betting business and is something that we would all win if it was eradicated. Is always tough to analyze one match and at the end you never had a chance because he already decided to fix it.
Following odds movement, ammount of money placed and the player performances would be the best way to detect this situations.
Here is a great example of what is most likely a fixed match:
http://www.oddsportal.com/tennis/ger...louk-CfxxAVfi/
Open around 1.35, closed as underdog. I've watched that match at the time and remember to be something terrible.