The striker won the Serie A title under the Portugese's helm, while also finishing as the league's top scorer, with 25 goals, footballer of the year, foreign footballer of the year and winning 'Goal of the Year'.
Ibrahimovic was then sold to Barcelona for €46 million plus Samuel Eto'o as Inter went on to win the treble, including the Champions League, and the Swede admits he regrets not working under Mourinho for longer.
"I had a great experience with Jose," he told Telefoot .
"We worked together for one year at Inter. The feeling was great between us and my only regret is that we were together for only one year."
Ibrahimovic faces off against Mourinho again on Wednesday in the Champions League last-16 second leg, with Paris Saint-Germain holding out for a 1-1 draw in the opening leg.