This strategy is very common and can be easy to discover when you are watching the match. As we all know that foolball is strictly professional, there are roles, tactics, formation, rules...that all the players must accept and perform off and on the pitch. The players are very professional and they hardly make mistakes except if the match has been fixed using manager-match fixing strategy. However, these are some characteristics of match fixing strategy

1 If you see defenders overlapping again and again in a match

2 when you see that a team especially big teams are comiting too much offences in a match

3 When a striker is spending too much at time in midfield,

4 When a pass that should become an assist is being wasted by kicking it to throwing corner, or to wrong person

5 when several chances have been wasted

6 When they say they are using a particular formation but in the match you can not see the formation all of them are just running around like idiots

7 when one on one with keeper is missed

When you see some or all of these when you last espect it then you should know that the match maybe fixed match.
Although few if them sometimes are human errors

I typically divided this strategy into four which are:

1 personal-match fixing strategy

2 External-match fixing strategy

3 Internal-match fixing strategy

4 Individual-match fixing strategy