"McMaster, who played 20 matches for the Roar, will be back-up to Phoenix number one custodian Mark Paston, starting with this Sunday's match against the Central Coast Mariners in Wellington.
The Phoenix continue to investigate options with a view to signing an additional goalkeeper on a permanent basis.
The club has also narrowed down candidates for another potential signing. Head coach Ricki Herbert is looking for another attacking-minded player and has identified targets from overseas.
As it stands, the Phoenix have 20 contracted players on its books, with scope to sign an additional three players (including one foreigner) should they be required."
Sounds like they have an offer out for Vukovic and another attacking player.
Source: In the Nix email.