Has anybody seen Shinji Kagawa?
The Japanese star has not played a single minute in the Premier League this season, an unused substitute in David Moyes' first two matches as manager.
He featured for just seven in the Community Shield, introduced along with teenager Adnan Januzaj for a short kickabout with the game already won.
It's clearly too early to jump to conclusions about the playmaker, or is it?
Kagawa admitted his debut season, in which contributed six goals and six assists, was below his high standards - and he wants more from the upcoming campaign.
Except at least this time last season he started the club's opening home match, scoring against Fulham, but he begun this campaign where the last one ended.
It appears David Moyes has not yet figured out how yet to best utilise his attacking talents; if he had, then Kagawa would have featured in a game he desperately wanted to win against Chelsea.
He found a way to force Wayne Rooney into the side, despite all the obvious reservations he would have had regarding the Englishman, but the same willingness has not been shown towards Kagawa.
There have been concerns that Kagawa is 'tired' after summer involvement with the Confederations Cup in Brazil, but such exploits have not prevented Spaniards, Fernando Torres, Neymar, David Villa or Edinson Cavani from making appearances for their respective clubs already this season.
Kagawa was left as an unused substitute in another huge game last season, United's do or die Champions League game against Real Madrid at Old Trafford; which they lost.
He was frequently cast out on the left hand side of midfield, a position which does not bring the best out of his ability, with a central role his preference.
Indeed his former boss at Borussia Dortmund, Jurgen Klopp said he cried every time he saw Kagawa out on the left, admitting he would love to be reunited with his former star.
The problem at United is, with Van Persie up front, Wayne Rooney is forced to drop deep centrally, into the position Kagawa likes to accommodate, with the Japanese player moved aside.
With Rooney staying, it isn't going to be a problem which goes away for United, and Moyes needs to figure a way to work it out.
Otherwise if he can't, the prospect of Kagawa heading back to the Bundesliga next summer may become more real than just an intention on Klopp's behalf.
What do you think of Kagawa being left out of the United team so early on?
image: © Marcel Sigg