Wolves striker Raul Jimenez appeared to look uncomfortable in a recent training session with Mexico.
The 31-year-old is battling hard to try and be fit for the nation at the World Cup.

Jimenez was included in the squad by Tata Martino, and was then handed 45 minutes against Sweden in a friendly match last week.
That was something that irked some Wolves fans, who have felt in the dark about the situation for weeks.
Jimenez came through that game having looked OK in terms of his movement.
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He was clearly really lacking match fitness and sharpness, but he was moving about relatively freely.
But journalist Rodolfo Landeros shared new video footage over the weekend of Jimenez in training with Mexico.
And the former Benfica man does not appear to be moving the best. The players can be seen doing a rondo drill, and when the ball comes to Jimenez, he is unable to react quickly.
The ball goes by him, and he then goes into the middle of the circle as the next player to try and win the ball back.
There was no lunging or anything, with Landeros saying that the player was ‘still struggling’ and ‘didn’t look comfortable’.
Jimenez is facing a race against time to be fit for Mexico’s first game against Poland on Tuesday.
At the moment, it is looking like it’d be a major surprise if Jimenez was to start that game.
Martino’s other forward options include Hirving Lozano, Henry Martin, Rogelio Funes Mori and Alexis Vega, who has been linked with Wolves recently.
Wolves officials will be very worried about Raul Jimenez in the coming weeks
It is concerning that Jimenez is still struggling with his mobility, with the World Cup having now officially begun.
With Martino having given him 45 minutes against Sweden, it feels as though he will be very keen to get him involved in Qatar.
It feels as though he’ll get minutes despite being nowhere near match sharp.

And it is worrying, because there is the potential for Jimenez to aggravate his issue.
If he ends up suffering a setback, then that will be a major blow for Wolves, who are crying out for goals. Jimenez may not have been in good form lately, but he’s still a centre-forward Wanderers need.
Undoubtedly, officials will be very worried ahead of that Mexico-Poland game on Tuesday.