Manchester United striker Javier Hernandez knows he's far from the finished article.

Hernandez is just focused on improving each day so that he's ready to play his part when called upon in the run-in.

"I want to be a world-class player, so I need to work on every aspect of my game: my movement, goals and body strength, because I'm not the tallest or the strongest," the 23-year-old told ESPN.

"I need to be ready to compete in this tough league because it's very physical, quick and technical. With the help of the coaches and my team-mates, I'm improving day by day.

"I do my best and if the manager wants me to play one minute or 90 minutes, I need to be ready to help the team."