What individual or team setting should I change if I see my player being man marked?

[DaSilva9]

For example in my last game my rightback was tracked by the other teams left winger

What is the best way to take advantage of that?

[Marsupian]

It's perfectly normal for a left winger to mark your rightback, it's his job defensively. If he is marking and tracking back poorly you can use that to create a numbers advantage down the right by sending him forward with an attack duty but that obviously comes at the cost of having said winger left in space if the rightback is caught upfield on the transition.

If a playmaker gets manmarked out of the game that can be a real problem and you can then either wait for the marking player to have a lapse of concentration, make the playmaker more mobile (enganche to trequartista or AP for instance) or change his role and remove his playmaking duties so your team will look for other venues to attack through.