Kylian Mbappe netted a brace before Mauro Icardi scored late on from the penalty spot as Paris Saint-Germain returned to the top of Ligue 1 on Saturday.
But the France star gave the visitors a huge injury scare ahead of the midweek Champions league tie against Manchester City by limping off late on after going down under an innocuous challenge.
Mbappe attempted to carry on after receiving treatment but clearly in pain, he was replaced by Julian Draxler in the 87th minute.
Mbappe scored either side of half-time at the Stade Saint-Symphorien on Saturday
PSG opened the scoring inside four minutes when Mbappe latched on to a floated pass from midfielder Ander Herrera, before smashing it past Metz goalkeeper Alexandre Oukidja.