By heddo - 23-12-2011 00:49
this is a copy and paste from help/manual A03 SQUAD...
Red and Yellow Cards
If a player receives two yellow cards in games within the same competition (or three in the League) or if he is shown a red card in a certain competition, he will be banned from playing in the next game in that competition. If he receives two yellow cards in one game, he will be sent off but will receive no further ban. Note that, as Friendlies aren’t seen as competitive games, any cards received in them will have no knock-on effects in future games.
to verify that you have no players banned in upcoming fixtures you should check SQUAD INJURIES/SUSPENSIONS it is available on the left of the squad page, a suspended player will be listed and the competition he is suspended from will be highlighted in red..