Germany coach Joachim Low has said Mario Gotze is "feeling better all the time" as the Borussia Dortmund midfielder continues his recovery from metabolic problems.
In March, Dortmund confirmed that Germany international midfielder Gotze would not play again this season as he receives treatment for a metabolic disorder.
The 24-year-old was diagnosed with the disorder in February, and Dortmund said he "can start back training in early summer" if he responds well to treatment.
Speaking in Hamburg on Thursday, Low said he had been in contact with Gotze around "two or three weeks ago" and added: "He's feeling better all the time.
"He is getting physician-directed therapy and this has worked pretty well. But he should take all the time he needs and then possibly return in preseason.
"Before the diagnosis, it was always a bit unclear what was wrong with Mario. He trained a lot, he always put in extra shifts, he was very professional.
"It was a relief for him to find a reason. He will be able to cope with a heavy workload again, and he will be able to play again."