Lionel Messi left out of the Paris St Germain squad as he battles a knee injury

PSG’s Lionel Messi has been left out of the squad for the Ligue 1 trip to Metz (Francois Mori/AP/PA)

Lionel Messi has been left out of the Paris St Germain squad for Wednesday evening’s Ligue 1 trip to Metz as he battles a knee injury.

The 34-year-old Argentina superstar underwent a scan on Tuesday after being substituted 14 minutes from time in Sunday’s 2-1 victory over Lyon and is due to be assessed once again on Thursday.