The PSG striker, 32, enjoyed stints in Sweden, Holland, Italy and Spain before making the move to the French capital in 2012.
Ibrahimovic throughout his career has been linked with big money moves to the Premier League - but ahead of PSG's Champions League quarter-final first-leg clash against Chelsea, the Swedish international made it clear he has no regrets overlooking a move to England.
Mourinho, who managed Ibrahimovic at Inter Milan, believes it will be a pity that the big frontman never tested himself in what the Special One described as the 'best league in the world'.
"I think he has to be where he is happy, and if he's happy in Paris - and I know he is - then he has to stay," Mourinho said.
"But, at the same time, I think it's a pity for him when he finishes his career and he played in the most important countries in the world of football, and won the most important championships in the world of football, but he didn't play in the best league in the world and never won the best league in the world.
"It's a pity. But his career is so rich and so full of success that I think he can be considered one of the greatest players, even if he never played in the Premier League."
When asked about his personal opinion of Ibrahimovic, Mourinho added: “We connected very well. We never had a problem.
"The only time we disagreed was obvious because I wanted him to stay in Inter, and he wanted to leave for Barcelona.
"But that's normal. In the year, the relation was phenomenal. When people say he has a difficult personality, for me the difficult personalities are the players who don't want to win, to work, to be the best.
"He wants to win, to work, to be the best. He has a big ego, big self-esteem, so for me to be his coach was no problem.
"We are friends. We will stay like that. We respect each other. Tomorrow he wants to win, I want to win. That's the nature of football.”
