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Signing experienced player Álvaro Morata is good move for Como as his skill and leadership could be good to avoiding relegation from Serie A. However you are right to be realistic as moving up to top league is huge challenge. But they have strong financial backing building successful team takes more than just few big signings. It requires time for players to build chemistry and adapt to higher level of competition. For this season staying in league is most important goal which would provide solid base for team to grow in future.
but are you sure that Como is a team that is going to be relegated, because in my opinion it is anything but a team that is going to be relegated, in fact it is building a team that can aim very high, Nico Paz is a player that everyone wants but he remained there, so it is not necessarily true that this team will be doing badly