The French striker lasted just over half an hour before limping to the verge of tears
Replays showed Mbappe’s right ankle was bent inward by the tackle, which sparked a furious scrum between the two sets of players, even Saint-Étienne goalkeeper Jessy Moulin coming out of his box. repair to get involved.
Mbappe, meanwhile, twisted in pain on the grass as the PSG medical team sprinted onto the pitch to assess the damage.
After several minutes of treatment, the 21-year-old walked off the pitch still limping in obvious discomfort and watched on the verge of tears as he walked straight into the tunnel, with Pablo Sarabia coming in his place.
Perrin was initially booked for the challenge but after consulting the VAR monitor, referee Amaury Delerue decided to increase his penalty to a red card, the third time Saint-Etienne had a player sent off in the first half in a match against PSG this season. .
PSG also lost defender Thilo Kehrer to injury in the first 45 minutes, with Colin Dagba in his place.
Mbappe had previously played a key role in PSG’s opener, with his fierce shot parried by Moulin on the way to Neymar, which shattered the rebound off the bar up close.
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Seven minutes of time were added at the end of an eventful first half which saw seven yellow cards alongside Perrin’s red, including once for PSG replacement Marco Verratti for discussing with the referee while ‘he was going to check the VAR monitor.
While the severity of the injury is not yet known, Mbappe’s participation in remaining PSG matches this season could now be in doubt.
Thomas Tuchel’s side face Lyon in the League Cup final next week before a huge clash against Serie A side Atalanta in the Champions League quarter-finals in Lisbon on August 12.