"At half-time, I thought I was the luckiest manager in the Premier League, because to be 1-1 in a half when it should be like 5 or 6-2, we were really lucky", he said.
Manchester United fought back from a goal down to beat Bournemouth at lunchtime.
Losing the Spaniard on a free would be a huge error from the United, and more importantly, replacing the former Atletico Madrid man would be almost impossible.
"When we make a defensive mistake, instead of forgetting and keeping playing, it is something that triggers instability".
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"It looked like we don't work tactically during the week, which obviously is the worst feeling for me as we work so much that I expect my team to be really good". In the second half, I could understand some of the frustration because we produced some incredible chances and we didn't score.
United have a host of other players out of contract next summer, with Juan Mata, Ashley Young, Antonio Valencia, Matteo Darmian, Ander Herrera, Chris Smalling, Phil Jones and Andreas Pereira all falling into that category. "We are going to be in a better position", he said.
Mourinho puts that record down to his attempt to strike a balance between the defensive strengths demonstrated more frequently last season and develop his team as an attacking force. I felt like people watching this game don't believe how hard we have worked this week, our pressure on this opponent in the first half was a disaster. In the second half, we were fantastic and we want to be a whole-game team. "I think a lot of the aspects of our game were really good, especially during the opening period". No matter how many minutes to the end of the game, we have the feeling that anything can happen.
United face the Serie A champions on Wednesday and Mourinho can not be certain whether the Belgium striker will be ready to travel.
He insisted that Manchester United must remember they were fortunate to win the game at Bournemouth and they need to get better in order to achieve anything this season.