The former Barcelona superstar was taken off on his last outing against Lyon, with it confirmed that he is nursing a slight knock.

Lionel Messi has handed Paris Saint-Germain an untimely injury headache, with the Ligue 1 giants revealing that the Argentine forward has undergone a scan on a knee problem.

The six-time Ballon d'Or winner was surprisingly taken off in his latest appearance against Lyon, with Mauricio Pochettino having to fend off plenty of questions as to why the all-time great was withdrawn.

There were suggestions at the time that the 34-year-old Argentine had taken a slight knock, with that now confirmed by PSG ahead of their midweek outing against Metz.

What has been said?

In a fitness update on the club's official website, PSG said: "Lionel Messi, who took a knock to his left knee against Lyon, underwent an MRI on Tuesday morning which confirmed signs of bruising of the bone. 

"A follow-up examination will be carried out in 48 hours."

With Messi now being rested in a bid to prevent him from suffering any further damage, he will not figure in a meeting with Metz on Wednesday.