Chelsea's 2-1 defeat in extra-time against bottom-of-the-table strugglers Sunderland has underlined that it may be time for 'The Special One' to change his approach.
It's something he is more than prepared to do.
Despite his Chelsea side being the more dominant of the two sides across the 120 minutes of action, they emerged from the Stadium of Light as the also-rans, as Gus Poyet's Sunderland continue their Wembley push.
A 118th minute winner from on-loan Ki Sung-Yeung sunk the Blues, leaving Mourinho wondering whether it was time to go back to the drawing board as his attack faltered yet again, whilst David Luiz made a crucial error to allow Sunderland back into the game.
“We had chances and chances and chances but not enough goals. Maybe the way to rectify it is not to concede as many goals,” the Chelsea boss said.
“We lose goals and the opponents come alive. We scored against Sunderland and afterwards we had two or three more chances. If we had scored then goodbye, but we kept the opponents alive."
After recent defeats on the road against Roberto Martinez's Everton and Mark Hughes' Stoke City, questions have been raised about the profligacy of his front line.
The summer window saw Mourinho allow Romelu Lukaku depart on loan for a spell at Goodison Park.
In addition to the January loss of Daniel Sturridge to Liverpool, Chelsea have only added an aging Samuel Eto'o to their striking ranks.
We should not be surprised to see Mourinho dip into the January market as poor finishing threatens to blight his first season back at the West London club since his return from Real Madrid.
Mourinho felt that his side had enough chances to win the game, but were perhaps too open in their approach, allowing first Fabio Borini and later Ki Sung-Yeung to dump his toiling Blues out of the competition.
The former Inter Milan and Porto boss admitted that he is considering adopting more conservative tactics, in pursuit of a tighter defence. He believes that this will compensate for a lack of striking ability, but may cause more dull encounters.
“We are going in one direction and the right direction, but it is quite frustrating. Football is about getting results and it’s quite frustrating as we may have to take a step back in order to be more consistent at the back.
"It’s something I don’t want to do, to play more counter-attacking, but I’m giving it serious thought. If I want to win 1-0 I think I can as I think it is one of the easiest things in football. It is not so difficult, as you don’t give players the chance to express themselves.”
There would be no better time for Mourinho to produce a rabbit from the hat than this Sunday, as his Chelsea side take part in a Christmas cracker that sees them visit the Emirates to take on league leaders Arsenal.