FRANCK FIFE/Getty Images
Paris Saint-Germain striker Kylian Mbappe missed training on Monday through illness ahead of Wednesday's crunch UEFA Champions League clash with Borussia Dortmund.
Goal's Benjamin Quarez reported as much on Monday. His absence would be a significant blow to PSG's chances of overturning their 2-1 deficit against the German side and avoiding a fourth consecutive last-16 exit.
Mbappe has eclipsed Neymar as PSG's most important player during their time at the club.
He was PSG's top scorer last season as Thomas Tuchel's side retained their league title, racking up 33 goals in 29 league games for PSG.