The 23-year-old defender started France’s Nations League game against Croatia but lasted only 45 minutes before being withdrawn.
His absence for the second half prompted questions from the press, who are aware that Chelsea have been trying to negotiate a deal for the defender, and that any injury could complicate the move.
French manager Didier Deschamps took time to reveal that the defender had been carrying an injury for most of the season and had scheduled operation to correct it.
He said: said: “I knew very well his physical condition today.
“Tomorrow he will have a [surgical] intervention because he has a problem that has been going on for several months.
“In principle, if everything goes according to plan, he should be available for the start of the season.”
Chelsea have lost Antonio Ruidger to Real Madrid and have released Andreas Christensen with the defender reportedly closing in on a deal with Barcelona.
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