The Spaniard has played a vital role in the club’s impressive showings with his new midfield role and has kickstarted his career at Old Trafford under the Portuguese boss.
Last season under Louis van Gaal, Herrera had found it hard to break into the side, but now, he’s a guaranteed starter and has also earned his first Spain cap with Mourinho’s guidance.
Speaking about the team, Herrera claims the side have continued to improve following Mourinho’s arrival.
“We are playing well and we are controlling most of the games,” he said.
“When you watch Manchester United now you realise quickly who is the big team and that means we are finding our identity, the DNA of this club and its history.
“The most important thing in my opinion is we are not conceding too many chances and we are behaving like a big team. Of course we have to improve and be more clinical because we are creating a lot more chances than we are scoring but we can be happy and we can even more optimistic for the next few months and the next year because I think we are doing the right things and working in the right way.
“We all know [which direction the manager wants the team to go in],” he added. “Since I have been at this club I have won two trophies, the FA Cup and Community Shield, but we don’t want to stop. Now we are in four competitions and we have the obligation to fight for everything.
“We are Man United and we have to respect our history and fight for everything and we have the conditions to do it because we have a very good squad. I always say I am very happy and proud to be part of this team and hopefully I can keep being an important player.”
Despite a mixed start to the campaign, United have clawed back the gap on the top four in the Premier League as they sit only two points off fourth-placed Arsenal.
Hopes are United can maintain their impressive form as they face Reading in the FA Cup Third round on Saturday at Old Trafford.