The Japanese international playmaker had a difficult first year at Old Trafford despite picking up a Premier League winners' medal in his debut season with the club
Manchester United midfielder Shinji Kagawa admits his performances have not been up to scratch during a difficult first season at Old Trafford.
The 24-year-old arrived in Manchester last summer but did not live up to the reputation he built whilst playing in Germany for Borussia Dortmund.
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And having been bought by former United manager Sir Alex Ferguson, Kagawa now has to impress new boss David Moyes.
"It was a tough time for me with a lot going on in my head," Kagawa told the Premier League's official website.
"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."
Kagawa made 26 appearances for United last season, scoring six times.