DC United coach Ben Olsen admits they face losing Luis Acosta this summer.
Olsen told ESPN: "He is of great importance in what we do here. If he leaves, we will have to replace him with a talented player.
"We have some players internally to plug the hole, but he's not a player that you replace by snapping your fingers. This will happen next month or in two months.
"We prefer to have him, but it's football. We will do our best to keep him."