Wales manager Chris Coleman says he does not know when midfielder Aaron Ramsey will return from injury.
Ramsey has not played since injuring his hamstring while playing for Arsenal in their opening-day Premier League defeat by Liverpool on 14 August.
The initial estimate was three weeks, but the 25-year-old will miss Wales' 2018 World Cup qualifiers against Austria and Georgia in October.
"The disappointment is we expected him to be here," said Coleman.
"I had an indication that he would only be out for three weeks when he initially did it. That was six weeks ago - so I don't know now.