4) Fabregas decline
After a blistering start at Chelsea last season, it’s fair to say Cesc Fabregas’ form tailed off in the second half of the campaign. This continues a worrying trend that was seen during his time at Barcelona, and follows on from some injury-hit seasons with Arsenal towards the end of his time at the club. Quite simply, with the Spaniard starting his career so young, he has now played so much it is little surprise to see him coming towards the end of his career at a relatively young age. Elsewhere in the squad, there isn’t really another player who can provide that same ammunition as Fabregas in terms of creativity and assists from deep, and that is another issue that Mourinho needs to address.