City are eyeing Quarta – and could offer up Nicolas Otamendi as part of a swap deal, reports TNT Sports.
Agent Gustavo Goni said: "Until the quarantine, Chino had many lovers, there were many clubs that had come to see him.
"I think there will be interested sides again when the picture is clearer. The idea is to agree with River an opportunity for everyone, hopefully the best possible offer will come out.
"In case that doesn't happen, we will have to get together and see what is most beneficial for everyone.
"But today we're imagining, it's a matter of waiting. He's one of the players that River have to sell."
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