The Armenia international endured a stuttering start to life at Old Trafford following his arrival at the club from Borussia Dortmund in the summer.
Mkhitaryan struggled for form and fitness in the opening weeks of the season but has since improved significantly and become a regular fixture in the Manchester United side.
The playmaker has scored two goals in 13 Premier League games for the Red Devils so far this season and will be hoping to help Manchester United finish in the top four this term.
And the midfielder admits that his first few weeks at Manchester United presented a significant challenge for him.
Speaking to Sky Sports, Mkhitaryan said: “I really enjoy my life in Manchester, my training, my games, everything. I have settled very well and I’m working very hard to get better because I know I can do more.
“Coming to Manchester, maybe I didn’t show all my potential but in every game I’m trying to do my best because it’s very important for me, the fans and the club. Maybe in some games it doesn’t work, but I still keep working and trying to improve.
“You cannot always have good times in your life. Sometimes you have black days and maybe I wasn’t expecting that but I was ready because I had such a situation in Dortmund already.
“Everything comes from your mind. You have to push yourself to get things going in your direction. If you are stubborn, nothing will help. If you are sad, nothing will help. You have to keep positive and to work very well for your next chance.
“The players are very friendly and you can settle very quickly here because everyone tries to help you. The club tries to find solutions if you have any problems so I think coming here after just one or two months I already felt I was part of Manchester.”
Manchester United are currently gearing up for their Premier League clash against Leicester City at the King Power Stadium on Sunday afternoon.
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