Matthew joined Manchester United in the summer of 2012 from Reading, having previously been at Arsenal, where his two younger brothers still play. He joined Manchester United as a winger and failed to make an Under-18 appearance in his first season. However a considerable growth spurt in the summer of 2013 saw him become a key component of the side in the 2013/14 season, playing now in central midfield role. During that campaign, his energy in the middle saw him make more appearances than any other player at Under-18 level and he made his Under-21 debut too.
Matthew had to be patient in the 2014/15 season, making do with a fringe role in the Under-21 side. It was a similar story for the first half of the 2015/16 season.