Neymar was taken off on a stretcher in Paris Saint-Germain's Ligue 1 clash with Lille on Sunday.
The Brazil star had assisted Kylian Mbappe's opener and put PSG 2-0 up in a thrilling first half at Parc des Princes.
But with PSG leading 2-1, Neymar had to go off shortly into the second half following a clash with Benjamin Andre, in which he appeared to injure his right ankle.
The 31-year-old was ultimately unable to walk off and was evidently in distress as he was carried from the field.
Insult was added to injury for PSG when Marco Verratti was adjudged to have fouled Tiago Djalo in the penalty area, with Jonathan David duly converting from the spot to restore parity.
Neymar's injury could present a huge blow to PSG's Champions League hopes; they trail Bayern Munich 1-0 heading into the second leg of their last-16 tie at Allianz Arena.
There is just under three weeks until that clash on March 8, and Christophe Galtier – who also lost Nuno Mendes to injury in the first half – will be hoping Neymar's issue is not as serious as it first appeared.
