The former Red Devil comes face to face with his old team-mates at Old Trafford on Sunday in his debut for new club West Ham.
The Premier League fixtures have thrown up an emotional debut for Hernandez who returns to the ground where he made his name in football.
Hernandez remains a firm favourite among United fans and the Mexican is still debating whether to celebrate in front of them if he scores on Sunday.
‘I don’t know if I will celebrate if I score at Old Trafford,’ said Hernandez.
Manchester United 2017/18 Fixtures
West Ham (H) – Sun Aug 13
Swansea (A) – Sat Aug 19
Leicester City (H) – Sat Aug 26
Stoke City (A) – Sat Sep 9
Everton (H) – Sun Sep 17
Southampton (A) – Sat Sep 23
‘It’s my old club, my old fans, my old stadium but it’ll be my first goal for West Ham.
‘I am not thinking about the celebration, I just want to have the chance to start and get my team the result.’
Sir Alex Ferguson signed Hernandez from Chivas as an unknown forward in 2010 and the striker went on to score an impressive 59 goals in 158 appearances.
West Ham forked out £16million to Bayer Leverkusen to bring Hernandez back to England this summer.
Hernandez will re-introduce himself to the Premier League in front of his old fans and the 29-year-old admitted he was not sure how he should feel.
‘I don’t know how to describe it. I just can say that it’s luck,’ he said.
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‘I’m very lucky to go back to my old club, my old home, my old house.
‘To start my new chapter in this second part of my life in the Premier League is going to be something happy.
‘I have very good memories from those four years in Manchester.’