Town defender Tommy Smith limped off with a knee injury during the second half of New Zealand's 0-0 friendly draw with Trinidad and Tobago in Port of Spain overnight.
The Blues defender, who was making his 25th appearance for the All Whites, was replaced in the 64th minute, having also been subbed during the friendly against MLS side Chivas USA on Friday.
Town boss Mick McCarthy will hope the 23-year-old's problem is nothing serious ahead of Saturday's home game against Burnley.
Meanwhile, Mexico were confirmed in fourth in the CONCACAF qualifying group after losing 2-1 to Costa Rica and are therefore the All Whites’ opponents in next month’s two-legged play-off for a place at next summer’s World Cup in Brazil.
The New Zealanders will travel to the Azteca Stadium in Mexico City for the first leg, which is expected to be watched by a crowd of 105,000, on November 14th with the second leg at the Westpac Stadium in Wellington on November 20th.