David Tua's fight against Russian Alexander Ustinov could be postponed after the veteran New Zealand heavyweight suffered a leg injury.
Promoter David Higgins said Tua, 40, suffered a grade one calf muscle tear during training this week, which may force the fight in Hamilton to be moved back from August 31.
He told LiveSport Radio that a decision will be made after Tua's fitness is assessed following a scan this week.
Higgins said any postponement of the fight - Tua's first in more than two years - would see it moved to the following month.
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