Manchester United striker Javier Hernandez could become an injury doubt for his club after suffering a knee injury while on international duty with Mexico.

The 25-year-old will undergo tests after he collided with Nigerian goalkeeper Vincent Enyeama during a goalless draw on Wednesday.

Hernandez told Univision: "I don't feel good, the goalkeeper fell on top of me, I'll wait for the tests."

Mexico national team doctor Jose Vazquez told ESPN Deportes: "We have to wait to see how it evolves and to run the relevant tests.

"It's a blow, but we rule out the possibility of a knee ligament strain. There is only pain and there is no indication of instability in the knee."

Hernandez has struggled to secure a regular spot in manager David Moyes's first team this season.