By ESPNSTAR.com staff
Hernandez had been expected to represent Mexico at the Olympic Games in London but pulled out after club and country agreed it was in the player's best interests if he was withdrawn from the squad.
That meant that for the first time in three years, the 24-year-old had a proper summer off after playing in the 2010 FIFA World Cup and the Gold Cup the following year, and the player is hoping the break can help him this season.
"My first season [2010/11] was very good for some people and for some people it was okay," he said on the club's official website.
"My second season was okay for some people and very bad for others. Me? I'm happy and I'm enjoying my football. I just hope that this summer's break helps a lot.
"I had a proper rest and had my first pre-season with the team, so it's going to help my fitness. I'm the happiest player in the world to play for this club."
Following the summer arrival of Netherlands international Robin van Persie, Hernandez has found himself pushed down the pecking order at Old Trafford, and only made his first start of the term last Saturday in United's 4-0 win over Wigan, where he scored a goal and made an assist.
Nonetheless, the Mexico international insists he is ready to do his part for the club whether he is named in the starting XI or amongst the substitutes.
"I'm always ready if the boss asks me to start or be on the bench," Hernandez added. "I'm focused on the most important thing - the game [against Galatasaray on Wednesday].
"I'm looking forward to it."
Hernandez netted 20 goals in 45 appearances in his first season at United but he was plagued by injuries last term, and only managed 12 goals in 36 games in all competition.