This season the 35 year old Swedish striker has scored 20 goals in his career.
The Manchester United manager says that the next season could be the last season of Zlatan’s top level football and it could be with the Red Devils.
Last season the Manchester United side brought him from the French capital PSG for a free transfer and Ibrahimovic has signed a one year deal with them, and he could stay another year with the Red Devils.
The special one is hoping the last season could be his last and with them only.
This season the 35 year old former Swedish international is playing an exceptional football for them.
Mourinho added: "I'm totally convinced he is going to stay,"
"He came with the intention to stay two years, but in the minds of everyone the first year is going better than every expectation.
"He knows we are going to try again to improve next season and try to share with him, in a fantastic way, probably the last year of his career at the highest level.
"So I'm convinced that he's staying, he's adapted to the club, to the situation.
"I don't see any problem with his family. I gave him the possibility of a few days off to go to Sweden, but he doesn't want to, he prefers to stay here, so I'm totally convinced he is going to stay."
But it would occur any additions to the team will be limited in number as the special one voiced the sentiments of Ed Woodward the chief executive of Manchester United, he said that he is not expecting the Manchester United squad to go per the “churn” of prior campaigns.
In the recent past the Manchester United player offload Memphis Depay and Morgan Schneiderlin and they could sign three or four players in the upcoming transfer window.
Mourinho elucidated: "We have a squad that, like every squad, needs changes but we know also that our squad has potential, our squad has good players,"
"We prefer to bring two, three or four good players who fit in the idea of the way we are trying to play and improve our squad.
"We are not interested in selling six or seven and buying six or seven, and from those six or seven only one or two are great quality and the others are the same as the ones we are selling.
"We are stable. We think our market in the summer will be soft and natural. Some players will leave, some players will come but in a very natural way. I think our summer [activity] will be quite small."