Bayern Munich coach Jupp Heynckes has said Renato Sanches, on loan at Swansea City, is back in Munich for treatment on a hamstring injury.
Sanches is expected to return to action next month after suffering the setback in an FA Cup tie against Notts County last month, Swans coach Carlos Carvalhal said.
"He is a very important man, and it's no secret that he is here," Heynckes told a news conference. "He is getting treatment from Dr. Muller-Wohlfahrt.
"Hasan Salihamidzic [Bayern's sporting director] is in constant contact with the player and his adviser. He still belongs to Bayern."
Carvalhal, meanwhile, told the official Swansea website that he expects Sanches back soon.
"In the beginning they said it could be long term, but I believe he will come back next month," Carvalhal said.
"That's my feeling. I think he will be back sooner than we expect."
Sanches has made 12 Premier League appearances for Swansea in a loan spell that has seen him struggle with a string of injuries.
Information from ESPN FC's Bayern correspondent Mark Lovell was used in this report.