The Mexico striker had the chance to speak with the Spanish club's sporting director over the summer but was not interested because he wants to defend the Premier League title.
The Mexico international found chances somewhat limited last season and rumors in some circles suggested that he could leave the club following the retirement of Sir Alex Ferguson.
But Eduardo Hernandez has rubbished reports that his client wants to leave the Premier League champions and reiterated his commitment to succeeding in England.
"Of course he wants to play more, to have more minutes, to participate more, but he wants to do it at United, he wants to defend the title and go far in the Champions League," he told El Universal.
"The interest from Valencia was real. He had the chance to speak with the sporting director [Braulio Vazquez] but Javier, I reiterate, wants to stay at Manchester United, this is the challenge. He was very grateful to Valencia and the other clubs who called him.
"It's not a question of money - we didn't even talk about that subject, there's only one subject for Javier: he wants to play and be a starter at United."
Chicharito scored 10 goals in 22 appearances last term and is working hard to ensure that he features in the plans of Ferguson's successor, David Moyes.
"He knows it's a very competitive club and that he has to fight to play every day, in the dressing room and on the training ground, but he's not scared, he says he's more motivated than ever," Hernandez added. "[His outlook] is the same as when he moved to English football; to triumph. Now, with the new manager, he has a lot of hopes, a big desire to play and to grow as a footballer. This season is a new challenge for him.
"He wants to triumph in England. He knows that a starting spot comes with working hard and he has to take advantage of the opportunities that come his way, like he did with Alex Ferguson."
The 25-year-old sat out Saturday's 4-1 win over Swansea City after recently recovering from injury.