So who does Jose Mourinho have at his disposal as he ponders his team selection for the match against the Mexicans? We take a look at his options...
GOALKEEPER
Sergio Romero is the most senior keeper on the trip, until David De Gea's arrival, but is not believed to be fully fit after missing the World Cup due to injury. That means Joel Pereira, who is set to be loaned out on the squad's return to England, or Lee Grant, who could make his debut, appear to be vying to start between the sticks.