United host Liverpool in the early kick-off knowing a win would see them leapfrog Manchester City in the table.
"You know in your mind it's Liverpool and it doesn't matter where the teams are in the league, you want to win," Hernandez told.
The Anfield side are seventh in the league and struggling to regain a place in the Champions League places but they knocked United out of the FA Cup at Anfield a fortnight ago.
