Mourinho has repeatedly called for more backing in the transfer market if United are to close the record 19-point gap they trailed Manchester City by last season despite finishing second in the table.
'At home, honestly, I think we can not concede two goals.
The Times learnt that there is most disquiet among the biggest clubs, as they are the ones most likely to have players targeted by foreign clubs and less time to sign players from their domestic rivals.
As for United, well, I'm unsure that all is well in the camp at Old Trafford; I really don't feel the team and players are totally behind the manager. We must be better than we were last season. Champions Manchester City had already signed winger Riyad Mahrez for a club-record 60 million pounds from Leicester. Manchester United signed midfielder Fred, defender Diogo Dalot and goalkeeper Lee Grant last month, but manager Jose Mourinho was left frustrated in his efforts to further strengthen.
However there were a few clubs hell bent on making sure Jim White could say the words "we're just hearing" with promoted sides Wolves and Fulham amongst the few who did anything of interest, and that was a theme of the whole window.
Cardiff have spent a fair bit themselves, £41 million in total, but they have their work cut out to stay in the league, having kept much of the squad that many didn't deem good enough for promotion from the Championship.
It is back, the Premier League is back, the vagaries are back, the mystique is back, the moment of glory is back, the gut-wrenching moments are back.
"You expect that as one of the teams coming up", added the Bluebirds midfielder.
After 22 years with Arsene Wenger at the helm, Arsenal enter into a new chapter this season with head coach Unai Emery.
"The Premier League is tough no matter who you are playing". The Foxes grabbed one goal back through Jamie Vardy's strike during the injury-time but it was too late for Claude Puel's troops to stage a comeback. According to data analysis website FiveThirtyEight, City has a 45-per-cent chance of winning the Premier League again this season.
He also praised Luke Shaw, who scored to seal the win and had been a target for Mourinho's criticism last season.