Januzaj joins the Black Cats on a season-long loan having been deemed surplus to requirements by Jose Mourinho.
Indeed, the Belgian international has never been able to scale the heights he reached during Moyes’ own ill-fated Old Trafford reign and having failed to sustain his early promise, even his new manager admits taking him to Wearside on a season-long loan is a risk.
But the Scot, who takes an injury-depleted side to Manchester City today for his first Premier League game in over two years, is in no doubt that under his guidance Januzaj can rediscover the form which made him one of the game’s brightest prospects.
To do that, however, he wants the 21-year-old to ask himself a few searching questions.
“It can’t always be a manager’s fault that he hasn’t progressed,” said Moyes.
“Players have to develop themselves and Adnan has to look at himself and ask has he prepared right, has he got himself in the best condition, has he trained well enough and when he’s got his opportunity, has he played well enough?