Ok for this achievement, the first thing you have to do is get one of your players sent off. You get a player sent off by commiting fouls, the easiest way to do this is to just slide the opposition player (), by doing this you will usually get either a yellow card or a straight red card. If you get a yellow card, just do the same thing again, meaning you will get another yellow card, 2 yellow cards = red card = sent off.
Once you have your player sent off, you must then win the current match. I found the easiest way to do this achievement was to score a few goals and take the lead, and then get a man sent off. This way you dont have to worry about scoring with 10 players instead of 11.
Can be done with 2 pads.