What people don't realise is that we don't need backups that will can only be used agaimst 70% of laliga teams,we need backups that can step up and perform to the same level or perform better than the person they are replacing in the first 11, whether it is laliga or in a champions league final and so if mascherano cannot play as cb against big teams he should not be considered as a back-up cb.our second 11 are just too average or poor,look at bayern in the first league against us,mandzukic was suspended,kroos injured,badstubber injured and they could still field a strong 11,madrid and chelsea can do the same,but just imagined if it had been us;messi suspended,pique injured,iniesta also injured;our team would have been poor and seriously lacking in quality.