Japanese has only been used as a bit-part player this season by Moyes.
Unsettled Manchester United midfield player Shinji Kagawa has admitted that he is currently fighting for his future with the Premier League champions, according to reports in the Daily Mail.
The Japan international was given a rare start in the top flight by new Red Devils head coach David Moyes against West Bromwich Albion at Old Trafford on Saturday afternoon, however, Kagawa lasted for just 45 minutes before being given the hook by the Scot for the second half as the home team went on to suffer a shock 2-1 loss.
Kagawa has so far featured in four matches in total so far this season in all competitions under Moyes, although the weekend reverse against the Baggies was his first start in the Premier League for United, and now the playmaker has revealed that he must improve his performances, and fast, if he wants to remain in the north west going forward.
“I have to take this like some kind of message (from the manager),” said Kagawa. “I need to improve more and more, or I cannot survive at this club.
“I have to take this in a positive way and keep trying to do my best.
“I thought that I would have been able to find some space to create the chances in the second half. In that sense I was disappointed (to have been substituted).
“Sure, I wasn’t involved that much, I didn’t touch the ball enough but I was trying to be patient so I didn’t feel that bad.”
Kagawa has only been at the club for a year now, with the 24-year-old arriving at the ‘Theatre of Dreams’ last June from Bundesliga giants Borussia Dortmund on a four-year deal for a fee of £16 million, and in the process becoming the first-ever Japanese to play for United.