West Ham United striker Javier Hernandez has picked up a suspected hamstring injury on international duty with Mexico.
Hernandez pulled up early in the second half of Friday evening's 3-3 draw with Belgium in Brussels on what was his 100th appearance for El Tricolor.
The extent of the injury is unknown, but Sky Sports News reports that new Hammers boss David Moyes is concerned about a potential layoff for the 29-year-old.
Moyes, appointed West Ham boss earlier this week, previously managed the Mexican ace during their time together at Manchester United.
Hernandez leads the Premier League scoring charts for United this season, finding the net four times in 11 appearances.