Kicking the living s... out of my players.

Seriously there every game I have 2 or 3 players that suddenly are totally in the red or have to be subbed because of injuries caused by opposition players that seam to be over aggressive against my team.

There were also 9 straight red cards for opposition teams when playing my team this season.

Does this happen because I say something in press conferences that riles them up or is it normal if you play as the favorite team that the other teams try to compensate for their lack of skill with extremely hard play?

I play as Manchester United and Nani, Bale and Rooney have all been out for 3+ weeks twice because of injuries they suffered on the field due to overaggressive opposition.

So if you have any advice how to counter that I would appreciate some tips.