"I really hope he's fit again soon. Bayern and the national team need him and his moments of genius," Sane told Sky Sport.
"It's so incredibly bitter, I was stunned at first," emphasised Sane. He said he had "written to Musiala directly on WhatsApp, and we also spoke on the phone later.
"He was just on his way back to being 100 per cent fit, and then this happened. I feel so sorry for him. It's so frustrating."