On 21 October 2017 , Mooy scored the opening goal as Huddersfield upset Manchester United 2–1 in a Premier League clash at John Smith 's Stadium.. Mooy went on to be a key player in Huddersfield 's campaign , adding another 2 goals to his tally at Vicarage Road , in a 4-1 away victory for the Terriers on 16 December 2017.
On December 16 , 2017 , the Terriers won 4-1 at Vicarage Road .