Captain Daniel Vettori told a news conference on Monday that New Zealand's leading one-day batsman would be assessed before the game after colliding with team mate Neil Broom in the field against Pakistan on Saturday.
New Zealand must win to advance to the semifinals.
"It's unfortunate for us," Vettori said. "Brendon did it on the last ball of the game against Pakistan. He's going to have an injection today and we're going to see how he goes.
"It's another injury that we desperately didn't need. But we're still hoping he can play tomorrow and we're hoping Ross Taylor will be fit as well."
Middle-order batsman Taylor, another key member of the Kiwi side, injured a hamstring in the group match against South Africa and missed the Super Eight matches against Ireland and Pakistan.