"?Japanese play-maker Shinji Kagawa has reflected on his time at Manchester United, where he believes he should have fought more to succeed at Old Trafford.
Kagawa joined United in the summer of 2012, which ended up being Sir Alex Ferguson's final season at the club, with the Red Devils going on to win the Premier League and the midfielder featuring 20 times and scoring six goals.
The Japanese international's second season though, was one to forget. After David Moyes took the helm, Kagawa was unable to have any sort of impact.
After playing 18 times he failed to register a single Premier League goal and was sold back to Dortmund by incoming manager Louis Van Gaal in 2014.
In an interview with FourFourTwo, Kagawa, 27, was asked what he would have done differently at Manchester United.
"Fight more, every day "? even a small player like me should fight every day to succeed at a club like Manchester United and it's the same now at Dortmund."
"I just have to focus on how I can get better every day to try to succeed at this level. Of course, you also have to be mentally strong."
Kagawa was then asked about his time at Manchester United and how he reflects on it, in which he gives a very honest response to "?FourFourTwo.
"I was still young, just 24 or 25. I had a lot of experiences there and that helped me grow, and looking back I wasn't concerned about anything, just focusing on doing the best I could."
"Of course there were good players there but everyone thinks differently; the Dortmund coach is the Dortmund coach, and the Manchester United coach is the Manchester United coach, and I just have to accept how everything went."
Kagawa has played well on his return to Borussia Dortmund, making 57 appearances and scoring 14 goals from midfield during the last two seasons in the Bundesliga.