PSG director Leonardo admits the club might have made a mistake releasing Edinson Cavani and Thiago Silva.
Both veterans were allowed to leave on free transfers after their contracts expired at the end of last season.
Cavani scored his first goal for Manchester United on Saturday, while Silva did the same for Chelsea.
"At one moment, we have to say 'what are we going to do?'," Leonardo said.
"We spoke clearly with them. It was a moment where we could not give them exactly what they wanted. It was a financial and generational problem.
"It was the moment to count on Marquinhos and Kimpembe. The decisions were difficult to take. Aside from that, we could have made a mistake."
