New Zealand Football confirmed on Monday All Whites captain Winston Reid is still under an injury cloud ahead of next week's clash with Korea Republic in Seoul.
Reid did not feature for West Ham United in Sunday's (NZ time) clash with Sunderland and is still recovering from a hamstring injury which has kept the 18-cap All White out of action in recent weeks.
All Whites coach Anthony Hudson says he is in constant contact with the 26-year-old centre back and his club and Reid would be given every possible chance to be involved in next week's match.
"Winston is our captain and leader and we will continue to monitor his situation closely," Hudson said.
"He is obviously an important member of our squad and we will give him every chance to be involved and we will make a final decision later in the week."
Men's U-20 and Wanderers SC central defender Adam Mitchell has been called into the All Whites squad as cover.
Meanwhile, midfielder Ryan Thomas has been ruled out of the tour through injury.
Thomas started for Dutch Eredivisie club PEC Zwolle in Monday morning's (NZ time) match against Excelsior but was forced off after 30 minutes with a leg injury.
Men's U-20 and Wanderers SC midfielder Moses Dyer will replace Thomas in the squad for next Wednesday's match against the 56th-ranked Asian nation.
Hudson said while it was disappointing to lose Thomas, it provides another opportunity for a player with a bright future.
"It's a shame for Ryan that he has picked up an injury this morning but unfortunately that is the nature of football," Hudson said.
"In Moses, we are bringing in a player who has performed well in the ASB Premiership and, similar to Cameron coming in for Kosta, at this stage of our campaign we are giving an opportunity to someone in the U-23 bracket with an eye on the future as well as the coming Olympic qualifiers."
The New Zealand-based players and management staff departed for Seoul on Monday morning.