Manchester City are set to be fined £50m and will have to contest next season's Champions League with a squad size limited to 21 players, after being found guilty of breaching UEFA's financial fair play rules.Arsenal boss Arsene Wenger is among those to have previously called for harsh sanctions on clubs that break Financial Fair Play rules. He said last week: "There are rules to apply for Financial Fair Play. If you don't respect them, you have to apply the rules. "One of the rules is that normally you should be banned for the excess of the financial amount that is not justified, that is if you are £100m overboard, you should be punished for £100m of your wages bill in the Champions League. "I want to see that respected, if that is not respected, then the financial fair play will have problems to be respected in the future because everyone will just not consider it at all. "If it is not respected, of course we will feel let down."