Watching Anthony Martial leave Wembley on crutches last night would have been a worrying sight for Manchester United fans.
The exceptionally talented teenager, who has been the Red Devils' standout player since his arrival in Manchester in the summer transfer window, was substituted with just over 20 minutes remaining as England played host to France.
When speaking about Martial after the game, as per Sky Sports, France boss Didier Deschamps said: "He is in a lot of pain but it is just a knock on the top of his foot."
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Just a knock, claims Deschamps, but there are no guarantees that the attacking ace will prove his fitness in time for United's Premier League clash against new-boys Watford on Saturday. Van Gaal, then, may well have to change the dynamic of his side for the lunchtime kick-off...
But, without Martial, who should Van Gaal select?
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Potential United front-four
Juan Mata - Ander Herrera - Memphis Depay
It should work - here's why
You have to remember that Van Gaal never actually expected to make Martial such an important player so soon. Ultimately, upon his arrival, the United chief insisted that the Frenchman had been brought in for the next manager of Manchester United. So, Van Gaal must have been happy with the other options at his disposal.
There's no reason why the quartet of Juan Mata, Ander Herrera, Memphis Depay and Wayne Rooney won't be able to produce the goods at Vicarage Road. All four players are brilliantly talented and have wonderful attacking attributes.
There's a problem, of course; Depay and Rooney haven't exactly hit top form yet this season and fans of the Red Devils are extremely concerned about the latter leading the line. But it would be foolish to write off United's skipper at this stage.
Rooney has looked better in recent weeks: a crucial Champions League goal before the international break and a well-taken volley against France should improve his spirits in pursuit of getting back to his best.
Depay, on the other hand, has struggled recently, but it could be time for Louis van Gaal to give him another chance to shine. The Dutch international has had time to really think about things, so United fans will now be hoping to see their summer signing produce the goods.
The United faithful certainly won't worry about Juan Mata and Ander Herrera playing alongside each other. Both players have the class and nous to unlock the meanest defences in the Premier League and they often perform admirably.
With Rooney taking the lone-striker role, the trio of Herrera, Mata and Depay have the credentials to both create and score goals for United. The pace of Depay and the class and guile of the Spanish duo should prove to be a balanced attack for Van Gaal.
Of course, a number of United fans will be hoping for the inclusion of Jesse Lingard, but the Red Devils chief will be well aware that he has to handle the player correctly. Lingard will no doubt prove a valuable substitute, but it could be time for Depay to shine in England's elite division.
Manchester United fans: name your attacking quartet for this weekend's game. Have your say below!