Januzaj, who signed a new five-year contract with the Reds on 19 October 2013, joined the club as a sixteen year-old in 2011 from Anderlecht, one of the top clubs in Belgium - the country of his birth. Many observers eagerly anticipated him pulling on a red shirt and he did not disappoint, showing off his ability on the ball from the moment he started playing for United at Under-18 level. Playing with an upright style, always looking at the options open to him, he was threatening to become a key figure for Paul McGuinness' team after opening his goal account against Crewe Alexandra.
Unfortunately injury abruptly ended his 2011/12 season but at least he was given a glimpse of the future when travelling with the Reserves squad for the final match of the club's campaign - the Manchester Senior Cup final at the Etihad Stadium. After then forcing his way into the Under-21 side on a regular basis, he earned praise from Sir Alex Ferguson. "Adnan is a beautifully-balanced player," said Sir Alex. "He's only 18 and has to grow into his frame but he he has good balance, good acceleration and is a very good technical player."
Despite performing in some unfamiliar roles, including as a lone striker, Januzaj warmed to the task and was influential in the Barclays Under-21 Premier League success - even if he only found the net once in the competition. Sir Alex