With Manchester City first choice striker Sergio Aguero, .

The 20-year-old described that day as a dream come true for him to start and score in the derby.

"It took me some time to prove myself to get into the first-team squad, but everything I have been through, all the difficult times, have been worth it," Iheanacho wrote in the Players' Tribune.

"In September, I achieved something that every boy dreams about. I walked out onto the pitch at Old Trafford as a starter in the Manchester derby.

"Because I was only 19, I did not expect to be in the starting XI. I tried to tell myself, it was just a game of football but it is not a normal game.

"The atmosphere and intensity give you a very different feeling as soon as you step on the pitch. It was war for 90 minutes.

"In the 36th minute something really amazing happened. I was standing in front of the United goal when Kevin De Bruyne's shot struck the post.

"The ball came right to my feet and I kicked it into the back of the net without thinking. I looked over to the linesman, not believing that I had really scored. The flag was down. I was onside.

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"My team-mates ran over to me, and I felt what I can only describe as the 'Manchester Derby Feeling.

"No-one can know how I felt unless they've scored in the derby. I did not even celebrate. The feeling was too much."

Iheanacho and his Manchester City teammate will next face Tottenham at home in the Premier League.