Hernandez, who is a key player for Leeds and has been playing well for Marcelo Bielsa's side this season, believes that Valencia will win against United away from home at Old Trafford on Tuesday evening.
As reported by BBC, Manager Jose Mourinho stated that some of his players "care more than others" in a press conference in the build-up to the game when he was questioned about the team's poor run.
Earlier, NAIJ.com had reported how Manchester United manager Jose Mourinho came to terms with the fact that his employers are getting ready to sack him after reportedly getting a call from Zinedine Zidane.
"And you need complete work rate on the pitch".
Do you think Mourinho has lost the United dressing room?
Sack Race favourite Mourinho is now three games without a win, while his United side have failed to register a triumph on home soil since the opening day of the season.
'The team is always more important than individual.
"We didn't play well [against West Ham] but we gave our best in that moment", he said.
United and Valencia have played eight games against each other with five games ending in a draw, United winning twice and Valencia winning one game.
While the Paul Pogba debacle has earned most of the headlines, there's said to be a major divide in the squad since the public grievances were aired between the France worldwide and the former Chelsea boss.