Paris Saint-Germain were without Kylian Mbappe in Saturday's 2-1 Ligue 1 win over RC Lens due to a right calf injury.
The France international will miss next week's French league game away at Stade Rennais due to yellow card accumulation but was not risked this weekend at Parc des Princes with Mauricio Pochettino's men 2-1 down heading into Tuesday's UEFA Champions League semifinal second leg.
PSG described the injury as a "right calf contracture" and the Argentine explained in his press conference that Mbappe is in "discomfort."
"He is suffering from discomfort in his right calf," said Pochettino. "We hope that he is ok and that he will be with us as soon as possible. He is an important player and always has an impact on the team. We have some important players in our squad and hopefully we can perform well."
PSG won without the 22-year-old thanks to Neymar and Marquinhos goals in either half, but Lens made Pochettino's men sweat and Colin Dagba was also forced off injured during the first half.
The former captain declared post-match that he is still "optimistic" that Mbappe will be fit for the midweek clash at Etihad Stadium in Manchester.
"I am optimistic," he told Canal+. "Always. We think he will be there. We will see how he is tomorrow. A decision will be made before the game, but I am optimistic."
🗨️ "J'ai beaucoup aimé cette équipe. J'ai souffert et en même temps j'ai apprécié, mais nous méritons la victoire (...) Pour Kylian, je suis optimiste"— Canal Sports Club (@CanalSportsClub) May 1, 2021
M. Pochettino rend hommage à son adversaire du jour et donne des nouvelles de Mbappé 🤝#RCLPSG pic.twitter.com/lpujoNLR3E
On the topic of over-using Mbappe of late, Pochettino admitted on Friday that the possibility has been considered internally.
"We were talking about that with the different staff members and Kylian himself," said the South American. "He was so good against Metz that it was like he was flying. He also rested against Angers in the Coupe de France before that. He took a knock late on against Metz and that happens.
"It is not serious, but it can create a muscular imbalance and we need Kylian at his physical best."
Asked whether or not failure to reach the Champions League final could prompt Mbappe to leave PSG, Pochettino insisted that the Frenchman remains happy.
"It is more a question for Kylian than for me," he responded. "We still have the second leg against City and we know that we can do good things. In the Champions League, anything can happen in these games. We are still in the race for everything -- all of our objectives.
"We are doing everything to make sure that he stays. He still has a year of contract to go. He is happy with us and we still have a month to meet all of our objectives."
PSG face Rennes next week and Stade de Reims as well as Stade Brestois 29 in the battle for the Ligue 1 title.