By diesel-7 - 02-07-2018 05:10
Couple of ways to use them:
You can use them for scout matches against any team in the world, just select a team and on the club page tab you should see an option for 'scout/challenge'
You can also use them to test one of your tactics against another of your tactics, on your tactics page you should see a button called'test tactic'.
Or you can use it for a challenge, like against the 'world cup stars XI', or a 'top team's etc (really just another name for a scout match), go to matches tab and you should see a 'challenges' tab with options under it.