Romelu Lukaku has registered 10 goals in nine games for United this season, and will be looking to return to full fitness as soon as possible.
Manchester United received quite a scare today, with news that striker Romelu Lukaku missed training with the Belgium national team due to an ankle injury.
Belgium's first qualifier of the worldwide break does not come until Sunday, when they take on Bosnia.
The fact that both managed to play through their injuries last weekend suggests that neither knock is particularly serious, and supporters will just hope Martinez doesn't force them into action too early - especially with a trip to Anfield lingering on the horizon and Belgium already booked to feature in Moscow next year.
He will undergo a special training programme before Belgium's World Cup qualifiers against Bosnia on Sunday morning (Singapore time) and Cyprus on Tuesday.
The ten most expensive players entered Ousmane Dembele ("Barcelona", +45.0 m), Alex oxlade-Chamberlain (Liverpool +31,7), Neymar (PSG +28,4), Marcus Rashford ("Manchester United", +26,8), Kevin De Bruyne (Manchester city, +25,6), Mohammed Salah ("Liverpool", +25,2) and Gianluigi Donnarumma (Milan, +25,2). He hasn't joined the group yet since he arrived.
"We have to be patient", Martinez was quoted as saying by Het Laatste Nieuws.
"For me, I see that it is a bit hard for him to be involved on Saturday, but we are still hopeful that he can be involved on Tuesday".
"We will give it as long as we can to make the final call but he is very uncertain for Saturday".
Lukaku won 53 percent of the vote for September, with second and third-placed Harry Kane and Alvaro Morata taking 15 percent each.