Chelsea conquer Town and Liverpool the two property and away final campaign but defeats towards Aston Villa, Sunderland and Crystal Palace proved high-priced.
And Mourinho, who returned to Stamford Bridge for a next spell twelve months in the past, is nicely informed of the competition for the top spots and is aware of it will be rough to include to his past domestic haul of back again -to- back again titles in 2005 and 2006, two League Cups and an FA Cup triumph.
" Upcoming year will be very, really hard, even much more so than past," the Portuguese advised the club's website.
"I know Chelsea will be far better, but it's possible the other groups will be superior also, so it will all over again be the variety of league exactly where you really don't know if you are likely to complete initially or end sixth.
"In this moment I have to believe and come to feel and say we want to finish 1st."
For the initial time in 14 years Chelsea will start off a period without Frank Lampard in the squad after the 2001 signing from West Ham, who went on to become the club's history goalscorer, left at the finish of his agreement.
Following eight a long time at the club, remaining - back Ashley Cole is also a free of charge agent, though he is but to confirm in which he will participate in following year.
The arrival of striker Diego Costa from Atletico Madrid is imminent and he will join fellow Spain international Cesc Fabregas in a continuation of the evolution of the squad.
" Immediately after 10 several years of titles and great moments, this is a moment to rebuild once more, mainly because teams really don't past without end," Mourinho stated.
" Clubs indeed, but not the teams. In the same club you have to construct yet another staff. I was a tiny aspect of the process that manufactured Chelsea a pressure in the past 10 years, and I appear back with the dream to test to be a very little portion once more of the subsequent decade.
" That is what we are undertaking, and for absolutely sure the final results will occur."
Eden Hazard will keep on being a critical figure even with experiences linking the Belgium playmaker - and Chelsea's quantity 10 soon after transforming his squad range - with moves to Paris St-Germain and Barcelona.
" Persons like Eden bring the magic and gain matches in just one motion," additional Mourinho, who praised and criticised Hazard at occasions final term.
"They have the flair and the artist's touch of the football. At the exact same time, he was not just that. He had a major evolution and he scored much more goals than in advance of.
"His perform - charge for the group improved a whole lot far too, so for a player like him he deserved it and the reality he was recognised by the fans gives him for positive a lot more urge for food for the subsequent period to be even far better."