Accrington Stanley goalkeeper Alex Cisak could miss large chunks of next season because of international commitments.
Cisak, currently with the Australia Under-23s squad bidding to qualify for next year's Olympics, missed Sunday's 3-0 win over Yemen due to injury.
Group matches are scheduled for September 21, November 23 and 27, February 5 and 22 as well as March 14, with an extra play-off game at the end of March if required. Australia could also face a potential second play-off against an African nation in April.
Cisak has yet to sign a new deal with Accrington after impressing towards the end of last season, but Stanley manager John Coleman said he was confident of holding on to the young Australian.