Chelsea boss Thomas Tuchel won't rule out buying a new wing-back.
With Ben Chilwell injured for the foreseeable future, Chelsea may be forced into the transfer market in January to bring in cover at left wing-back according to Tuchel.
"First, we must be sure what we do with Ben," Tuchel said.
"Then we decide if we go for internal solutions and if we trust that we can overcome this period.
"Everything depends on Ben Chilwell and how long he is out. Then on the alternatives, if there is something to do, if there is a chance to do something.
"But we did not start this process because we want to protect ourselves and not lose focus on the most important things. The most important things right now are Ben and Marcos. From there we go."