PSG's Kylian Mbappe walks using crutches after he was injured during the French Cup soccer final match between Paris Saint Germain and Saint Etienne at Stade de France stadium, in Saint Denis, north of Paris, July 24, 2020. (FRANCOIS MORI / AP)

Paris St-Germain forward Kylian Mbappe suffered an ankle sprain in Friday’s French Cup final win over St Etienne and his injury will be reassessed in three days’ time, the Ligue 1 champions said on Saturday.

Serious right ankle sprain to the external lateral compartment. To be re-evaluated in 72 hours with clinical and ankle imaging analysis.

Paris St-Germain's statement

A rough tackle from Loic Perrin saw the St Etienne defender catch Mbappe on the ankle and the 21-year-old collapsed on the pitch in pain before he was substituted. Perrin was sent off for the challenge as PSG won 1-0.

READ MORE: PSG beat 10-man St Etienne to win French Cup but Mbappe injured

"Serious right ankle sprain to the external lateral compartment. To be re-evaluated in 72 hours with clinical and ankle imaging analysis," the club said of Mbappe's injury in a statement.

Mbappe, who returned to the bench on crutches after halftime, told French President Emmanuel Macron during the trophy ceremony that he heard a crack when he was tackled but did not think he had broken his ankle.

Ligue 1 champions PSG did not say if Mbappe will feature in Friday’s French League Cup final against Olympique Lyonnais, with the Parisians chasing a quadruple of titles this season.

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They also face Italian side Atalanta in a Champions League quarterfinal single leg knockout game in Lisbon on Aug 12.