Leroy Sane has stepped up his recovery from a serious injury but Pep Guardiola cannot guarantee that he will be at Manchester City when the January transfer window closes.
The Germany winger has not played since damaging his anterior cruciate ligaments in the Community Shield victory over Liverpool in August.
Sane, 23, revealed on Instagram that he was back working on the pitch, though the club have not yet put a date on when he will be ready to return to first-team action.
"When will he be back? I don't know," Guardiola told a news conference ahead of City's Carabao Cup trip to Oxford United on Wednesday. "The process is [about] getting perfect, not setbacks.
"I think he is physically strong, muscular, but he is recovering well. The next step is on the pitch and then the team, and always will be so happy when he is back."
Meanwhile, Sergio Aguero is stepping up his own recovery from injury while David Silva could potentially come into consideration for Saturday's clash with Leicester City.
"[Sergio] is coming back,[he did] a training session. He did a big part of the training," Guardiola said.
"The next step is to take part in the training session with the team.
"David is not ready for tomorrow. We will see after that on Thursday or Friday whether he can train for Leicester, we will see."