Shinji Kagawa has again declared his unhappiness with his first season at Manchester United.

Despite picking up a league winners' medal as United secured their 20th title the Japan international was not satisfied from a personal point of view.

"It was a tough time for me with a lot going on in my head," said Kagawa of his first season after his move from Borussia Dortmund.

"I am not happy with my performance for the team at all. I didn't score that much and I also had my (knee) injury.

"Despite that, it was great we won the league, I just don't feel that I achieved everything that I wanted.

"For me personally, it wasn't a good season."