Shinji Kagawa joined Manchester United having won two consecutive Bundesliga titles with Borussia Dortmund.
Despite winning the Premier League in his first season with United, Kagawa admitted he is unhappy with how he performed but understands it may take some time to adjust to a different league.
“It was a tough time for me with a lot going on in my head. 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 played in Japan’s 2-1 defeat against Mexican in the Confederations Cup last week. Hernandez score a brace for the North American country.