 Mehmeti scored his debut goal in the following league fixture, a 4–1 away win against Peterborough United on 30 September 2017.However during a match against Brighton & Hove Albion U23 on 3 October 2017, he torn his hamstring in the eighth minutes and was substituted as a result.Following this, it was announced that Mehmeti would be sidelined for "several weeks".