#4 Will make Chelsea weaker
There are many people across the world who attribute Chelsea's downfall this season to one major factor: their decision to sell Nemanja Matic to Manchester United.
The Serbian was at the heart of everything good at Chelsea since his return to the club and their decision to sell such a vital cog in their setup proved to be catastrophic. Not only has his replacement been vapid, he has strengthened United to a very large extent.
If Mourinho is able to rope in Willian, it is likely that it will have similar consequences. And in their bid to contest for the Premier League next season, it may prove to be a shrewd buy as Chelsea will be dealt a double-blow.
Edited by Arvind Sriram