Samuel Eto’o, Eden Hazard and Willian's contributions on the field helped to turn the tide of the game and a potentially bad result into a 3-1 win.
“If the substitutes come in and they change the game, the manager did very well. If they come in and they make it worse, the manager made a very bad decision. In the end I always think it is their responsibility,” said Mourinho.
“The situation became difficult at 1-1. We all knew that a point here would be a bad result for us. The whole team, not just the boys that came on, and they coped well with that pressure.”
“Without losing totally the balance, we could risk a bit and try to bring to the game different things to see if Norwich could cope with that.”
Mourinho knew that something needed to be done as a second Norwich goal would certainly doom his team on Sunday night. Only being able to collect a single point at Tottenham recently, he needed his team to gain the full three points if Chelsea were to make any kind of impact on the table.
“I had to go with what I did. I had to put Eto'o, Hazard and Wilian, all three at the same time.”
“We could win, we could lose. At that moment we didn't want the point, we played with three guys at the back with Schurrle open, Eden central to make three quick strikers.
"We lost a bit of balance to try to gamble and create. We left the road a bit open for Norwich too.
"If they scored a second goal, probably we lose.
"We are trying to be top so after one point at Tottenham, one point here today would be a bad result, so we tried to win.”
In fact, the impact of Mourinho’s substitutes was felt at the very start of the game as Demba Ba was chosen to replace the suspended Fernando Torres.
“He did what I was expecting him to do," continued Mourinho.
'This kind of match - very direct, small pitch, very British, I decided to start with a more physical striker, also for defensive set-pieces.
"He did his job. I think he has to score that goal in the first minute of the second half. Put the ball in, 2-0, go home and no heart attack.”
Overall, it seemed that the Blues manager had played his cards right and fielding Wilian saw the young player score his first goal for Chelsea.
“It's good for the boy. It's difficult to arrive at the club when we had started the season already, and it's difficult to come from a league where normally a player loses a little bit of ambition, sharpness and condition.
"So step by step he's getting there.”