On 2 August 2016, Hernández signed with Championship club Leeds United on a six-month loan deal, with the option of a permanent move in January 2017, linking up with former Swansea manager Garry Monk and being given the number 19 shirt. After the former failed to receive his paperwork in time from the Qatar Football Association for the opening fixture against Queens Park Rangers (which ended in a 3–0 defeat), he made his debut on 10 August in a 3–2 win at Fleetwood Town in the EFL Cup.