Mourinho says he could see the result coming after it was settled by Oussama Assaidi late winner.
He said: "I could see that result happening because after half an hour we should have been winning three or four nil, and we weren't.
"The three players behind the striker were playing so well, creating so much, but you have to kill the game. Normally you kill the game but we didn't.
"I can compare this first half with another two first halves - Everton and Newcastle, they were exactly the same.
"We didn't score enough goals and on top of that we made defensive mistakes. If you don't score a lot of goals but you don't make defensive mistakes, then you can win with just one goal.
"In the last 15 or 20 minutes we didn't play well, the game they wanted was the game we gave them."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball