Kenny Dalglish's side dumped the Red Devils out of the FA Cup in the last meeting between the two, and while Chicharito only arrived in England following a move from Guadalajara back in 2010, the Mexican insists he already knew all about the intensity of the rivalry.
"I have learned about the rivalry between Manchester United and Liverpool," he was quoted as saying by the club's official website.
"But I knew a lot about this already in Mexico. In all the world, people know about the history of both teams, with so many Premier League titles and European Cups between them. It is a very important rivalry.
"[The build-up to this game] is a bit different. We work just the same as we have done for every game. But in the back of your mind, you know it is Liverpool."
The 23-year-old completed United's comeback against Chelsea last weekend as he headed in the equaliser late on after United had trailed by three goals at Stamford Bridge, and he insists that Sir Alex Ferguson's side always "fight until the last minute".
"We went home [from Chelsea] with a lot of confidence," he added. "To come back from 3-0 down shows the spirit of our team. Throughout Manchester United’s history, the team has never given up. We fight until the last minute.
"Right now, Manchester City are two points ahead of us but there are a lot of games to go, so we need to look forward, keep working and keep fighting."
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