Speaking earlier this season, Herrera – somebody who clearly loves the badge – expressed a desire to finish his career at Man United.
And the 27-year-old, now in his third season at United, has heaped praise on the change delivered by Mourinho in recent months.
“I know what he wants from me,” he said. “We have a clear relationship. I know what he expects from me and I will always try my best.”
“I can make mistakes, as can any player, but the most important thing for me is the achievements of the club and the team. I think everyone knows in the club that I try to always give everything. Sometimes more successfully than other times but I try my best, always.
“The manager has helped me a lot to find that position and to improve in that position. I am a team player. If I have to play 6, 8 or 10, I will be very happy. If I was at right-back, I would be happy as well.
“When you want to have a great season, there is no space for your own ‘likes’. I think you have the chance to help the team wherever the manager wants to play you. He will have no problem with me if I have to play wherever in the team.”
Herrera’s transformation from a ghostly, uncertain figure to a powerful, incessant presence at the heart of midfield has been somewhat monumental, but Mourinho hasn’t necessarily changed much to oversee this evolution.
Prior to the Portuguese’s arrival, the question concerning Herrera’s best position at Old Trafford was still unanswered. But Mourinho quickly put all doubt to rest, placing the Spaniard in a box-to-box midfielder role alongside the more attack-minded Pogba, and he hasn’t looked back since.